Year	kt
1960	2208840.658327724
1961	2318336.1016992154
1962	2480300.1074474296
1963	2638863.080909231
1964	2810425.903004525
1965	3032605.506938615
1966	3236216.924657172
1967	3460216.625950309
1968	3749735.8407275304
1969	4065426.9379241928
1970	4708799.422814393
1971	4928240.897826759
1972	5323936.449989918
1973	5659065.867665865
1974	5461968.482600736
1975	5267062.398961302
1976	5539494.252348006
1977	5724038.553653924
1978	5865080.133213693
1979	5912889.62042127
1980	5527951.003307737
1981	5128323.8811913775
1982	4903869.155558481
1983	4827297.3403480835
1984	4885340.883758719
1985	4809291.94739489
1986	4959430.022308311
1987	5026338.5574611435
1988	5225459.603405737
1989	5337319.753597116
1990	5097374.24320444
1991	5127446.953262454
1992	5270013.317837285
1993	5379849.570553305
1994	5464237.665018601
1995	5457202.257474448
1996	5604346.040049353
1997	5610093.585333857
1998	5615009.539559269
1999	5685179.634678013
2000	5799011.940005411
2001	5810856.593187751
2002	5761123.032326453
2003	5856215.101972686
2004	5931345.306594319
2005	5934833.573514748
2006	5877089.509398414
2007	5781129.05262853
2008	5652773.340618717
2009	5485921.585864683
2010	5509055.271654486
2011	5331304.522577343
2012	5340956.130311819
2013	5278705.588182749
2014	5281608.8249902325
2015	5521060.956374156
2016	5402595.405489067