Year kt 1960 748774.4850422703 1961 763675.7291041524 1962 818733.9850348404 1963 863625.4464480515 1964 926312.044381051 1965 963121.2693742644 1966 1041943.2016130534 1967 1103205.9164716818 1968 1197092.369945643 1969 1311355.6314045808 1970 1409836.1871706494 1971 1498448.9648643113 1972 1579289.887304309 1973 1605246.8417255217 1974 1586115.8127798068 1975 1532759.9287339267 1976 1597159.519410025 1977 1582054.0360213607 1978 1644174.3851042064 1979 1731302.909922494 1980 1728434.9426656945 1981 1706865.10512678 1982 1628064.0997594495 1983 1600317.7402838778 1984 1686542.7922076192 1985 1695665.907315947 1986 1628350.7222686538 1987 1695595.220993133 1988 1762058.9243590734 1989 1904876.4056324267 1990 1948757.104782216 1991 2044734.8727008626 1992 2075521.7392304856 1993 2151572.4840400126 1994 2200378.046767261 1995 2311172.9171571108 1996 2409625.0112996856 1997 2436201.825254321 1998 2452535.1189742605 1999 2570066.5335637587 2000 2687575.9158325926 2001 2650631.3861301844 2002 2719177.6077736425 2003 2761138.1624808703 2004 2774897.346736403 2005 2808812.432347318 2006 2829963.46018609 2007 2946396.9307957627 2008 2980440.5382772274 2009 2907781.61677623 2010 3067093.6554541863 2011 3060994.37468332 2012 3121113.2336722687 2013 3171178.0103309117 2014 3123397.2509145797 2015 3293513.3682008553 2016 3392570.705575617