| Natural | |||||
| Year | Coal | gas (dry) | Petroleum | Other | Total |
| quadrillion Btu | |||||
| 1949 | -0.87 | -0.02 | 0.75 | 0.02 | -0.13 |
| 1950 | -0.78 | -0.03 | 1.24 | 0.03 | 0.47 |
| 1951 | -1.67 | -0.03 | 0.98 | 0.01 | -0.71 |
| 1952 | -1.40 | -0.02 | 1.20 | 0.02 | -0.20 |
| 1953 | -0.97 | -0.02 | 1.44 | 0.02 | 0.47 |
| 1954 | -0.91 | -0.02 | 1.58 | 0.02 | 0.67 |
| 1955 | -1.46 | -0.02 | 1.98 | 0.04 | 0.54 |
| 1956 | -1.98 | -0.03 | 2.26 | 0.04 | 0.30 |
| 1957 | -2.18 | (s) | 2.26 | 0.02 | 0.12 |
| 1958 | -1.41 | 0.10 | 3.14 | 0.03 | 1.86 |
| 1959 | -1.04 | 0.12 | 3.46 | 0.03 | 2.57 |
| 1960 | -1.02 | 0.15 | 3.57 | 0.04 | 2.74 |
| 1961 | -0.98 | 0.22 | 3.82 | 0.02 | 3.08 |
| 1962 | -1.08 | 0.40 | 4.20 | (s) | 3.53 |
| 1963 | -1.35 | 0.40 | 4.21 | -0.01 | 3.25 |
| 1964 | -1.33 | 0.44 | 4.53 | 0.01 | 3.65 |
| 1965 | -1.37 | 0.44 | 5.01 | -0.02 | 4.06 |
| 1966 | -1.35 | 0.47 | 5.21 | -0.01 | 4.32 |
| 1967 | -1.35 | 0.50 | 4.91 | -0.02 | 4.04 |
| 1968 | -1.37 | 0.58 | 5.73 | -0.02 | 4.90 |
| 1969 | -1.53 | 0.70 | 6.42 | -0.02 | 5.56 |
| 1970 | -1.93 | 0.77 | 6.92 | -0.04 | 5.72 |
| 1971 | -1.54 | 0.88 | 8.07 | (s) | 7.41 |
| 1972 | -1.53 | 0.97 | 9.83 | 0.05 | 9.32 |
| 1973 | -1.42 | 0.98 | 12.98 | 0.14 | 12.68 |
| 1974 | -1.57 | 0.91 | 12.66 | 0.19 | 12.19 |
| 1975 | -1.74 | 0.90 | 12.51 | 0.08 | 11.75 |
| 1976 | -1.57 | 0.92 | 15.20 | 0.09 | 14.65 |
| 1977 | -1.40 | 0.98 | 18.24 | 0.20 | 18.02 |
| 1978 | -1.00 | 0.94 | 17.06 | 0.33 | 17.32 |
| 1979 | -1.70 | 1.24 | 16.93 | 0.27 | 16.75 |
| 1980 | -2.39 | 0.96 | 13.50 | 0.18 | 12.25 |
| 1981 | -2.92 | 0.86 | 11.38 | 0.33 | 9.65 |
| 1982 | -2.77 | 0.90 | 9.05 | 0.28 | 7.46 |
| 1983 | -2.01 | 0.89 | 9.08 | 0.36 | 8.31 |
| 1984 | -2.12 | 0.79 | 9.89 | 0.40 | 8.96 |
| 1985 | -2.39 | 0.90 | 8.95 | 0.41 | 7.87 |
| 1986 | -2.19 | 0.69 | 11.53 | 0.36 | 10.38 |
| 1987 | -2.05 | 0.94 | 12.53 | 0.49 | 11.91 |
| 1988 | -2.45 | 1.22 | 14.01 | 0.37 | 13.15 |
| 1989 | -2.57 | 1.28 | 15.33 | 0.14 | 14.18 |
| 1990 | -2.70 | 1.46 | 15.29 | 0.03 | 14.09 |
| 1991 | -2.77 | 1.67 | 14.22 | 0.22 | 13.34 |
| 1992 | -2.59 | 1.94 | 14.96 | 0.31 | 14.62 |
| 1993 | -1.76 | 2.25 | 16.40 | 0.32 | 17.22 |
| 1994 | -1.66 | 2.52 | 17.26 | 0.53 | 18.65 |
| 1995 | -2.08 | 2.74 | 16.87 | 0.47 | 18.00 |
| 1996 | -2.17 | 2.85 | 18.21 | 0.45 | 19.33 |
| 1997 | -2.01 | 2.90 | 19.64 | 0.40 | 20.94 |
| 1998 | -1.83 | 3.06 | 20.94 | 0.34 | 22.51 |
| 1999 | -1.31 | 3.48 | 20.57 | 0.36 | 23.10 |
Source: U.S. Department of Energy, Energy Information Administration, Annual Energy Review 1999, Table 1.4, p. 11, DOE/EIA-0384(99) (GPO, Washington, DC, 2000).
Notes: Net imports = imports minus exports. Other includes coal coke and small amounts of electricity transmitted across U.S. borders with Canada and Mexico. (s) = less than 0.0005 quadrillion Btu and greater than -0.005 quadrillion Btu. Totals may not agree with sum of components due to independent rounding. Previous-year data may have been revised. Current-year data are preliminary and may be revised in future publications.
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