Visualforce Page:

<apex:page controller="Graph" >
 <apex:chart height="250" width="350" data="{!pieData}"> 
  <apex:pieSeries dataField="data" labelField="name"/> 
  <apex:legend position="right"/> 
 </apex:chart>
 <apex:outputText value="{!temp1}"/>
</apex:page>

Apex:

public with sharing class Graph 
{  
 public List<PieWedgeData> getPieData() 
 {  
  List<PieWedgeData> data = new List<PieWedgeData>();
  List<Member__c> memb = new List<Member__c>();  
  
  String sql = 'SELECT Name, Year_s_Of_Experience__c FROM Member__c';
  memb = Database.Query(sql);
  for(Member__c temp:memb)
  {   
   data.add(new PieWedgeData(temp.Name,temp.Year_s_Of_Experience__c));
  }
  return data;  
 }  

 // Wrapper class  
 public class PieWedgeData 
 {  
  public String name { get; set; }  
  public Decimal data { get; set; }  
  
  public PieWedgeData(String name, Decimal data) 
  {  
   this.name = name;  
   this.data = data;  
  }  
 }  

Output: