I'm designing a leaderboard in VF that will bring back a table with either the top users with won opps, the top users for all ops, and the top users with tasks.  It's one table, but the type of data listed will be determined by a drop down, called selectedVal.  I've verified that I do have data there that should be pulling in, but there is no data that pulls through.  Would you please let me know what might fix this issue?


Controller:
 

public class LeaderboardsController {
    
    public list<AggregateResult> EntireList = new list<AggregateResult>();
    public list<allList> Top10List { get; private set; }
    public String OwnedBy { get; private set; }  
    public Integer Amount { get; private set; }  
    
    public LeaderboardsController()
        
    {
        
        //chart data       
        if (selectedVal == 'Top Won Opportunity Sales Leaders')
        {
            EntireList = [select Owned_By__c owner, sum(AMOUNT) amt
                          from Opportunity
                          where CloseDate = THIS_FISCAL_QUARTER and StageName = 'Closed Won'
                          group by Owned_By__c                                     
                          ORDER BY sum(Amount) DESC
                          LIMIT 10];
            for (AggregateResult ar : EntireList)
                System.debug(ar.get('owner')+'-'+ar.get('amt'));
        }
        else if (selectedVal == 'Top Opportunity Sales Leaders')
        {
            EntireList = [select Owned_By__c owner, sum(AMOUNT) amt
                          from Opportunity
                          where CREATEDDATE = THIS_FISCAL_QUARTER
                          group by Owned_By__c                                     
                          ORDER BY sum(Amount) DESC
                          LIMIT 10];
            for (AggregateResult ar : EntireList)
                System.debug(ar.get('owner')+'-'+ar.get('amt'));
        }
        else if (selectedVal == 'Top Meeting Leaders')
        {
            EntireList = [select OwnerID owner, count(Subject) amt
                          from Task
                          where CreatedDate = THIS_FISCAL_QUARTER and ActivityType__c = 'Meeting'
                          group by OwnerID                                    
                          ORDER BY count(Subject) DESC
                          LIMIT 10];
            for (AggregateResult ar : EntireList)
                System.debug(ar.get('owner')+'-'+ar.get('amt'));
        }
        else return;
        
        Top10List = new List<allList>();
        for (AggregateResult ar : EntireList) {
            Top10List.add(new allList(ar));
        }
    }
    //wrapper
    public class allList {
        public String OwnedBy { get; private set; }  
        public Integer Amount { get; private set; }  
        
        public allList(AggregateResult ar)  
        {  
            this.OwnedBy = String.valueOf(ar.get('owner'));  
            this.Amount = Integer.valueOf(ar.get('amt'));
        }
    }          
    
    //drop down boxes
    public String selectedVal{get;set;}  // This will hold the selected value, the id in here
    
    public List<SelectOption> getopenPresentationOptions(){
        List<SelectOption> optns = new List<Selectoption>();
        optns.add(new SelectOption('Top Won Opportunity Sales Leaders','Top Won Opportunity Sales Leaders'));
        optns.add(new SelectOption('Top Opportunity Sales Leaders','Top Opportunity Sales Leaders'));
        optns.add(new SelectOption('Top Meeting Leaders','Top Meeting Leaders'));
       
        
        return optns;
    }
    
    public String selectedCountry{get;set;}  // This will hold the selected value, the id in here
    
    public List<SelectOption> getopenCountryOptions(){
        List<SelectOption> optns = new List<Selectoption>();
        optns.add(new SelectOption('ALL','All'));        
        optns.add(new SelectOption('US Distribution','US Distribution'));
        optns.add(new SelectOption('CA Distribution','CA Distribution'));
        optns.add(new SelectOption('Contract','Contract'));
        optns.add(new SelectOption('Manufacturing','Manufacturing'));
        optns.add(new SelectOption('US Retail','US Retail'));
        
        
        return optns;
    }
    
    public String selectedRegion{get;set;}  // This will hold the selected value, the id in here
    
    public List<SelectOption> getopenRegionOptions(){
        List<SelectOption> optns = new List<Selectoption>();
        if(selectedCountry == 'US Distribution')
        {
            optns.add(new SelectOption('All','All'));
            optns.add(new SelectOption('Atlantic US','Atlantic US'));        
            optns.add(new SelectOption('Mid West','Mid West'));
            optns.add(new SelectOption('South East','South East'));
            optns.add(new SelectOption('South West','South West'));
            optns.add(new SelectOption('West','West'));
        }
        else if(selectedCountry == 'CA Distribution')
        {
            optns.add(new SelectOption('All','All'));
            optns.add(new SelectOption('Atlantic Canada','Atlantic Canada'));        
            optns.add(new SelectOption('BC','BC'));
            optns.add(new SelectOption('Head Office','Head Office'));
            optns.add(new SelectOption('Ontario','Ontario'));
            optns.add(new SelectOption('Prairies','Prairies'));
            optns.add(new SelectOption('Quebec','Quebec'));
        }
        else if(selectedCountry == 'Contract')
        {
            optns.add(new SelectOption('All','All'));
        }
        else if(selectedCountry == 'Manufacturing')
        {
            optns.add(new SelectOption('All','All'));
        }
        else if(selectedCountry == 'US Retail')
        {
            optns.add(new SelectOption('All','All'));
        }
        else
        {
            optns.add(new SelectOption('All','All'));
        }
        
        return optns;
    }
}

VF page:
 

<apex:page controller="LeaderboardsController" title="Leaderboards" readonly="false">
    <apex:form >
        <apex:selectList value="{!selectedVal}" size="1"> 
            <apex:selectOptions value="{!openPresentationOptions}" />
            <apex:actionSupport event="onchange" reRender="b"/>
        </apex:selectList>
        <apex:selectList value="{!selectedCountry}" size="1"> 
            <apex:selectOptions value="{!openCountryOptions}" /> 
            <apex:actionSupport event="onchange" reRender="a,b"/>
        </apex:selectList>
        <apex:selectList value="{!selectedRegion}" size="1" id="a"> 
            <apex:selectOptions value="{!openRegionOptions}" /> 
            <apex:actionSupport event="onchange" reRender="b"/>
        </apex:selectList>
    </apex:form>    
    <br/>
    <br/>
        <apex:pageBlock id="b">
        <apex:variable var="rowcount" value="{!1}" />
        <apex:pageBlockTable value="{!Top10List}" var="ar" >  
            <apex:column >
                {!rowcount} <apex:variable var="rowcount" value="{!rowcount+1}" />
            </apex:column>
            <apex:column value="{!ar.OwnedBy}" headerValue="User"/>
            <apex:column style="text-align:right" headerClass="CurrencyElement">
                <apex:facet name="header"><b>Total</b></apex:facet>
                <apex:outputText value="${0, number, ###,###,##0}">
                    <apex:param value="{!ar.Amount}"/>
                </apex:outputText>
            </apex:column>
        </apex:pageBlockTable>
    </apex:pageBlock>
</apex:page>