Year	kt
1960	12090.099
1961	12812.498
1962	13410.219
1963	13630.239
1964	14315.968
1965	14517.653
1966	15852.441
1967	17315.574
1968	20238.173
1969	22365.033
1970	22090.008
1971	25074.946
1972	28972.967
1973	32724.308
1974	37095.372
1975	42207.17
1976	51048.307
1977	50080.219
1978	51994.393
1979	50919.962
1980	52284.086
1981	50490.923
1982	52845.137
1983	51554.353
1984	60978.543
1985	62555.353
1986	59680.425
1987	66163.681
1988	70468.739
1989	84403.339
1990	89324.453
1991	94989.968
1992	94161.226
1993	96079.067
1994	92841.106
1995	102268.963
1996	105506.924
1997	108759.553
1998	117094.644
1999	127270.569
2000	132701.396
2001	133064.429
2002	132166.014
2003	145711.912
2004	151205.078
2005	161813.709
2006	158473.072
2007	159246.809
2008	159221.14
2009	146357.304
2010	155873.169
2011	146155.619
2012	140523.107
2013	131432.614
2014	116133.89