Year	kt
1960	61374.579
1961	72551.595
1962	91088.28
1963	107366.093
1964	122444.797
1965	134369.881
1966	155517.47
1967	168810.345
1968	181784.191
1969	199077.763
1970	225249.142
1971	239920.809
1972	254163.437
1973	274049.578
1974	272502.104
1975	252399.61
1976	267159.285
1977	255644.905
1978	266601.901
1979	276792.494
1980	270903.292
1981	258996.543
1982	247137.465
1983	245736.671
1984	233125.858
1985	231842.408
1986	235524.076
1987	243254.112
1988	247680.181
1989	252663.634
1990	252725.973
1991	256231.625
1992	259498.922
1993	258574.838
1994	254911.505
1995	265006.756
1996	261057.397
1997	261798.131
1998	260514.681
1999	251490.194
2000	250830.134
2001	246620.418
2002	247760.855
2003	244662.24
2004	237203.562
2005	228945.478
2006	223819.012
2007	216030.304
2008	204699.274
2009	188876.169
2010	178590.234
2011	175062.58
2012	154182.682
2013	150999.726
2014	143984.755