Year kt 1960 0 1961 0 1962 0 1963 0 1964 25.669 1965 33.003 1966 33.003 1967 51.338 1968 62.339 1969 62.339 1970 25.669 1971 33.003 1972 62.339 1973 205.352 1974 212.686 1975 124.678 1976 22.002 1977 51.338 1978 44.004 1979 190.684 1980 205.352 1981 102.676 1982 110.01 1983 110.01 1984 267.691 1985 212.686 1986 139.346 1987 231.021 1988 234.688 1989 216.353 1990 179.683 1991 300.694 1992 282.359 1993 311.695 1994 341.031 1995 744.401 1996 744.401 1997 810.407 1998 304.361 1999 1111.101 2000 979.089 2001 1118.435 2002 520.714 2003 663.727 2004 586.72 2005 938.752 2006 590.387 2007 748.068 2008 748.068 2009 704.064 2010 1103.767 2011 1114.768 2012 832.409 2013 1041.428 2014 1837.167 2015 2115.859 2016 2614.571