Year	kt
1960	14719.338
1961	19339.758
1962	16244.81
1963	15647.089
1964	15720.429
1965	17682.274
1966	16252.144
1967	17638.27
1968	20593.872
1969	27557.505
1970	29236.991
1971	31602.206
1972	34590.811
1973	38745.522
1974	39390.914
1975	40788.041
1976	45848.501
1977	56405.794
1978	62680.031
1979	63464.769
1980	66189.35
1981	70395.399
1982	75147.831
1983	77788.071
1984	74253.083
1985	78591.144
1986	78334.454
1987	75081.825
1988	87314.937
1989	84817.71
1990	82540.503
1991	103545.079
1992	117200.987
1993	117516.349
1994	113563.323
1995	113955.692
1996	124733.005
1997	143984.755
1998	113266.296
1999	106141.315
2000	155103.099
2001	149980.3
2002	156969.602
2003	162580.112
2004	174035.82
2005	174897.565
2006	152624.207
2007	166360.789
2008	158432.735
2009	181410.157
2010	195836.135
2011	211501.559
2012	218956.57
2013	229598.204
2014	220775.402
2015	219587.294
2016	211802.253