<chart caption='Colorado NOx Emissions from Electric Power Production for 2007' subcaption='Metric Tons'  plotGradientColor='' formatNumberScale='0' thousandSeparator='' palette='1' >
  <set label="Coal" value="59747" /> 
  <set label="Natural Gas" value="6646" /> 
  <set label="Petroleum" value="96" /> 
  <set label="Other" value="137" />    
</chart>
