Year H.Coal B.Coal Oil Smelting Total
kt/a kt/a kt/a kt/a kt/a
1951 0.0424 0 0 0 0.0424
1952 0.0276 0 0 0 0.0276
1953 0.026 0 0 0 0.026
1954 0.0381 0 0 0 0.0381
1955 0.0135 0 0 0 0.0135
1957 0.015 0 0 0 0.015
1958 0.014 0 0 0 0.014