Year	kt
1960	22313.577322335594
1961	26803.095882685393
1962	33105.76504686392
1963	34903.149123702824
1964	39940.554496948695
1965	44627.15464467118
1966	48411.12112222676
1967	53645.60808284532
1968	55494.233372401126
1969	56108.735104804204
1970	63774.25030516569
1971	65310.50463617339
1972	69493.59105578718
1973	77989.7468063587
1974	80770.59333389855
1975	81597.75731517814
1976	81050.25353709309
1977	87415.47731684438
1978	98074.07604704674
1979	113971.37999201963
1980	124177.0079705689
1981	127686.54657685503
1982	138996.20769539714
1983	145761.5272642186
1984	152117.30478696473
1985	156351.53841322023
1986	155291.99530116186
1987	163517.24860660365
1988	172478.4456288481
1989	216422.550130553
1990	183820.6370289837
1991	191361.10848028824
1992	168527.1756199182
1993	182911.53008469802
1994	199834.3000432625
1995	218315.53904917385
1996	242381.2921414115
1997	258190.3077050286
1998	285597.4567529795
1999	294059.6911253895
2000	294957.4991462873
2001	307613.4420373649
2002	319792.6048261358
2003	338023.9412994656
2004	368753.03318517614
2005	377443.4939371977
2006	407638.03011857776
2007	407284.2800201237
2008	418899.0749193658
2009	417857.477407251
2010	451212.1811348207
2011	449070.0837409542
2012	472472.0064622037
2013	484896.17134662915
2014	497650.49436148553
2015	508887.6621579337
2016	505426.9369413256