Year H.Coal B.Coal Oil Smelting Total
kt/a kt/a kt/a kt/a kt/a
1926 0 0 0 10.1 10.1
1927 0 0 0 10.6 10.6
1928 0 0 0 9.99 9.99
1929 0 0 0 10.2 10.2
1930 0 0 0 9.65 9.65
1931 0 0 0 11.4 11.4
1932 0 0 0 10.4 10.4
1933 0 0 0 9.26 9.26
1934 0 0 0 8.66 8.66
1935 0 0 0 11.7 11.7