Year	kt
1963	2255.366302614582
1964	2426.2273861459894
1965	1771.2598992755932
1966	2141.4589135936435
1967	1925.0348744538603
1968	2005.0485489421626
1969	2616.8609460514026
1970	2960.550056477508
1971	3937.066567252812
1972	4076.5689259349983
1973	4784.414227396462
1974	4081.7356799602653
1975	5502.593036908458
1976	7192.1216031704935
1977	14119.979372218722
1978	10969.539937976895
1979	9058.416124420013
1980	7551.269702346701
1981	15517.159566798917
1982	15662.276623535845
1983	8320.74636367799
1984	8507.263716786589
1985	11781.679471359746
1986	11817.946734464193
1987	13175.378582087877
1988	15377.319556286595
1989	15874.02974383825
1990	17788.43359169358
1991	19956.366597778404
1992	21865.59638118007
1993	24007.659064996576
1994	25280.47892059769
1995	25156.301373709768
1996	26576.747195956883
1997	27487.68527761537
1998	27842.796733177147
1999	30225.64606542502
2000	32367.702072787342
2001	29235.511645554103
2002	30089.13842900232
2003	39035.860781490024
2004	40143.32938636763
2005	56388.86285174559
2006	57100.590133821825
2007	56885.746776294895
2008	60594.46055967756
2009	58714.25078356468
2010	60049.19972460481
2011	69972.00681804049
2012	70842.0714276209
2013	70451.71811629564
2014	75643.8874621161
2015	76415.14002933943
2016	77177.03396611645