On the pie chart it reads:
1999 U.S. Electricity Generation by Fuel Type (Billion Kilowat hours)
Coal: 1882, 51%
Natural Gas:565 15.3%
Petroleum: 119, 3.2%
Nuclear: 728, 19.7%
Hydroelectric: 307, 8.3%
Other Renewables: 89, 2.5%
What was the total amount of electricity generated by fossil fuels? What percentage does this represent?