Year H.Coal B.Coal Oil Smelting Total
kt/a kt/a kt/a kt/a kt/a
1920 2.69 55.7 1.51 64.7 125
1921 3.96 59.2 1.66 90.7 156
1922 6.73 70.8 1.78 7.28 86.6
1923 7.49 78.2 1.6 9.39 96.7
1924 7.64 79.9 1.58 11.1 100
1925 11.5 78.7 1.94 10.4 103
1926 9.88 79.1 1.93 13.6 104
1927 12.2 88.5 1.96 17 120
1928 14.8 93.3 1.95 20.9 131
1929 17.8 104 2.03 21.1 145
1930 15.8 97.7 2.73 31.6 148
1931 14.7 88.8 1.38 31.7 137
1932 12.7 82 1.94 25.5 122
1933 12.2 75.9 1.72 41.7 132
1934 13 78.6 1.6 47.8 141
1935 14.1 80.2 1.47 46.8 143
1936 13.6 81 1.97 44.2 141
1937 14.6 91.9 1.78 59 167
1938 15.3 106 0.0117 64.2 186
1939 16.1 113 0.0117 67.8 197
1940 15.7 139 0.0117 59.8 215
1941 15 125 0.0662 32.2 173
1942 14.4 111 0.121 30 156
1943 13.8 97.3 0.175 27.9 139
1944 13.1 83.2 0.228 25.8 122
1945 12.5 69.1 0.281 11.5 93.3
1946 25.3 123 1.25 32.1 181
1947 33 167 2.25 43 246
1948 29.7 197 3.31 51 281
1949 36.7 221 4.61 49.7 312
1950 24.1 238 7 55.7 325
1951 21.7 222 7.13 48.9 299
1952 23.2 225 6 49.1 303
1953 24.5 210 8.06 48.6 291
1954 28 258 8.49 45.2 339
1955 38.1 287 8.6 42 376
1956 47.3 324 9.58 44.3 425
1957 52.8 341 10.3 45.5 450
1958 40.9 365 10.2 46.8 463
1959 44.3 407 10.6 46.1 508
1960 44.8 442 10.8 44.2 542
1961 46.6 470 10.2 48 575
1962 42.6 486 12.1 59.4 600
1963 46.4 541 13.5 70.9 672
1964 59.9 585 14.6 71.2 730
1965 54.7 576 18.6 69.2 718
1966 47.2 585 24.9 67 724
1967 35 531 29.3 67.9 663
1968 38.2 539 30.2 73.4 681
1969 35.5 537 33 81.4 687
1970 35.1 579 42.3 87.4 744
1971 40.3 631 42.7 88.6 803
1972 36.8 623 38.8 93.3 792
1973 36.5 657 62.5 98.1 854
1974 36.9 680 63.8 96.7 878
1975 39.8 727 64.2 98 929
1976 44.8 757 64.9 100 967
1977 38.5 769 79.8 97.5 985
1978 44 818 81 99 1042
1979 52 889 91 91 1122
1980 55 976 94 91 1217
1981 57 1079 82 86 1304
1982 55 1137 68 91 1351
1983 63 1228 61 97 1449
1984 65 1369 65 101 1600
1985 63 1437 58 108 1665
1986 63 1446 65 101 1676
1987 52 1505 69 94 1721
1988 58 1501 78 78 1716
1989 57 1586 70 93 1807
1990 43 1613 69 92 1817