1916 – 24,511

1920 – 180,122

1924 – 220,161

1928 – 305,745

1932 – 256,860

1936 – 310,308

1940 – 318,640

1944 – 669,158

1948 – 610,283

1952 – 613,374

1956 – 790,030

1960 – 565,681

1964 – 698,502

1972 – 264,258

1976 – 249,446

1980 – 114,875

1984 – 139,744

1992 – 27,686

1996 – 17,797

2002 – 41,771

Source: Prof. A.S. Sambo, Director General, Energy Commission of Nigeria. November, 2008.

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