Year	kt
1960	77469.042
1961	83728.611
1962	94502.257
1963	117707.033
1964	134083.855
1965	152341.848
1966	160412.915
1967	185729.883
1968	202286.388
1969	227328.331
1970	259568.595
1971	287232.443
1972	316462.1
1973	349479.768
1974	329839.316
1975	290052.366
1976	327679.453
1977	304614.023
1978	328786.887
1979	337525.348
1980	313675.18
1981	278383.972
1982	261156.406
1983	256205.956
1984	242363.031
1985	237683.939
1986	239983.148
1987	240965.904
1988	233628.237
1989	244812.587
1990	227948.054
1991	232909.505
1992	220474.708
1993	227302.662
1994	208652.3
1995	214083.127
1996	228685.121
1997	215498.589
1998	226917.627
1999	223356.97
2000	214680.848
2001	234497.316
2002	229081.157
2003	227533.683
2004	230269.265
2005	227973.723
2006	224772.432
2007	219095.916
2008	216129.313
2009	212667.665
2010	201538.32
2011	198696.395
2012	194105.311
2013	189268.538
2014	185605.205