Year	kt
1960	139257.992
1961	160995.968
1962	154340.363
1963	155466.132
1964	160339.575
1965	165884.079
1966	170588.84
1967	181648.512
1968	200284.206
1969	221204.441
1970	229451.524
1971	206554.776
1972	200379.548
1973	214559.837
1974	229378.184
1975	213595.416
1976	208553.291
1977	204688.273
1978	174882.897
1979	191094.704
1980	224482.739
1981	247559.17
1982	242828.74
1983	229983.239
1984	260390.003
1985	272010.726
1986	257676.423
1987	250599.113
1988	278739.671
1989	277331.543
1990	290008.362
1991	297573.383
1992	291306.48
1993	293143.647
1994	313836.528
1995	325460.918
1996	335519.499
1997	346065.791
1998	325207.895
1999	350297.509
2000	367261.051
2001	374488.708
2002	391272.567
2003	402801.615
2004	440051.001
2005	419603.809
2006	425331.663
2007	443835.345
2008	433820.768
2009	387257.202
2010	438848.225
2011	409761.581
2012	425166.648
2013	462793.735
2014	447318.995
2015	447473.009
2016	433780.431