Table 4.14. Fuel-Switching Capacity of Operable Generators Reporting Natural Gas as the Primary Fuel,
by Year of Initial Commercial Operation, 2016 (Megawatts, Percent)

Year of Initial Commercial Operation Number of Natural Gas-Fired Generators Reporting the Ability to Switch to Petroleum Liquids
Net Summer Capacity of Natural Gas-Fired Generators Reporting the Ability to Switch to Petroleum Liquids
Fuel Switchable Net Summer Capacity Reported to Have No Factors that Limit the Ability to Switch to Petroleum Liquids
Pre-1970 301 12,213.2 4,831.9
1970-1974 268 14,489.7 4,736.5
1975-1979 98 10,681.6 3,206.2
1980-1984 40 850.2 205.7
1985-1989 91 2,801.4 272.0
1990-1994 209 12,015.2 1,531.2
1995-1999 128 9,218.9 1,823.7
2000-2004 394 38,343.1 6,866.1
2005-2009 123 16,261.6 1,680.2
2010-2014 95 11,015.1 83.2
2015-2016 23 2,598.9 698.6
Total 1,770 130,488.9 25,935.3

Notes: Petroleum liquids include distillate fuel oil (all diesel and No. 1, No. 2, and No. 4 fuel oils), residual fuel oil (No. 5 and No. 6 fuel oils and bunker C fuel oil), jet fuel, kerosene, waste oil, and propane.
Source: U.S. Energy Information Administration, Form EIA-860, "Annual Electric Generator Report."