Year	kt
1960	25890.23386100546
1961	26140.079302366197
1962	26530.46280449234
1963	27385.402674148587
1964	27994.314136116544
1965	28130.852736278757
1966	29090.52404027607
1967	31965.636849406204
1968	33097.09476303099
1969	35531.39310486636
1970	33271.900890948986
1971	34395.79339113587
1972	34879.69155093855
1973	37545.033834367845
1974	40946.51638019317
1975	42511.177431123004
1976	43244.801568909956
1977	48532.83569271404
1978	55741.53271920722
1979	59948.88268919079
1980	53818.190415742116
1981	51090.60086378419
1982	53444.43175026211
1983	57764.8249658175
1984	64199.14138552748
1985	73506.7512072691
1986	73985.76208930853
1987	79996.27856990491
1988	81696.34051296032
1989	87251.95622097055
1990	86785.11857398838
1991	88198.7214361592
1992	86218.1240193814
1993	91403.41672222866
1994	97245.36838635139
1995	102846.33468575314
1996	110647.26415341401
1997	115688.34542385724
1998	118043.70028113452
1999	113818.97019402815
2000	114623.19352930135
2001	112536.8750218535
2002	115230.1846040718
2003	131852.09015387335
2004	126999.66551623077
2005	139381.3352163547
2006	144275.24996207768
2007	142514.32612446972
2008	144667.8621201316
2009	128967.26304706595
2010	161158.48204339267
2011	178937.40700714802
2012	170825.74332813808
2013	182632.9022983839
2014	187603.92949045452
2015	191202.3017480532
2016	187138.8699505159