Year kt 1960 0 1961 0 1962 0 1963 0 1964 99.009 1965 95.342 1966 106.343 1967 106.343 1968 106.343 1969 135.679 1970 165.015 1971 161.348 1972 135.679 1973 168.682 1974 80.674 1975 88.008 1976 729.733 1977 2097.524 1978 3080.28 1979 5533.503 1980 3080.28 1981 3663.333 1982 4085.038 1983 4202.382 1984 5353.82 1985 6886.626 1986 8049.065 1987 9992.575 1988 11532.715 1989 12321.12 1990 13025.184 1991 14917.356 1992 16131.133 1993 18525.684 1994 20175.834 1995 26032.033 1996 27729.854 1997 25082.28 1998 26314.392 1999 31649.877 2000 40751.371 2001 43395.278 2002 53013.819 2003 58261.296 2004 57670.909 2005 68679.243 2006 73893.717 2007 81194.714 2008 83380.246 2009 81854.774 2010 82016.122 2011 92756.765 2012 92995.12 2013 90472.224 2014 81766.766 2015 84219.989 2016 94901.96