Year	kt
1963	3325.361593847711
1964	3994.8974852264446
1965	4346.403828200279
1966	4921.088801633694
1967	5451.13804897519
1968	7465.325188872881
1969	8642.592464547155
1970	10059.776767965475
1971	10578.667083783994
1972	13457.67141671255
1973	17301.92332637878
1974	18105.36639603326
1975	19740.149864149666
1976	18122.10479331773
1977	21397.251195312037
1978	26056.105106155726
1979	35993.133627368436
1980	37142.503574235256
1981	35206.42895499842
1982	36138.19973716716
1983	36673.82845027016
1984	35959.656832799505
1985	42113.80756772237
1986	43754.17050160026
1987	42922.83010313833
1988	46800.558807373505
1989	54801.51270934937
1990	53222.52389884786
1991	57680.517042277934
1992	70256.63286867515
1993	78322.13742422783
1994	79243.44756384005
1995	80622.71888396128
1996	84571.96059352714
1997	89760.39137976443
1998	82621.58474241823
1999	87847.72997881507
2000	95379.84445353961
2001	93973.63424044727
2002	98996.48978857807
2003	106950.67359900677
2004	121582.37895702777
2005	128422.7668838297
2006	142518.58931670955
2007	163160.5894429805
2008	167200.7263982114
2009	171776.74627858354
2010	190154.3783584246
2011	210663.3347114729
2012	230704.7456968416
2013	213437.08700512288
2014	259161.97330044364
2015	256409.23428174562
2016	246317.60898609864