Year	kt
1960	20449.08225886421
1961	20798.40955106557
1962	20575.761386805367
1963	21508.580419826583
1964	22264.6814802666
1965	22379.74443365299
1966	23461.336195485066
1967	25916.413887622155
1968	26511.00301618661
1969	29038.60009194861
1970	26687.436195981827
1971	27795.896825564865
1972	29038.771593917463
1973	30876.23151379678
1974	34727.60888239561
1975	37270.89891763568
1976	38057.2857309452
1977	42488.35075304617
1978	50296.170310789435
1979	53841.34243430529
1980	46767.35344614292
1981	44764.84680198849
1982	48712.65511183132
1983	52058.683135074076
1984	56993.863142510316
1985	66792.91556343662
1986	66858.03827303619
1987	72700.89436202642
1988	72077.19721565745
1989	74388.32038379766
1990	72808.03252213888
1991	76405.2824243656
1992	75584.25404965358
1993	80729.2123762862
1994	84914.54865544125
1995	90258.0190830748
1996	93430.46576042518
1997	94064.95509589528
1998	93705.66595412308
1999	92302.96662691486
2000	97192.98762283602
2001	100635.10396449614
2002	103290.82673537995
2003	119652.5210479514
2004	113814.50978437062
2005	125150.93557789904
2006	127818.10542969179
2007	125356.90956134089
2008	123964.1398063826
2009	111547.50204574085
2010	139998.16312236807
2011	152903.22424913218
2012	141921.60418053064
2013	151495.48380543184
2014	157463.41833446553
2015	158344.871580122
2016	154674.32299072258