Year	kt
1960	58976.361
1961	60021.456
1962	61535.927
1963	63780.131
1964	67190.441
1965	71117.798
1966	71458.829
1967	75466.86
1968	76647.634
1969	78041.094
1970	74355.759
1971	74322.756
1972	77799.072
1973	79779.252
1974	85272.418
1975	87014.243
1976	88943.085
1977	96258.75
1978	104164.802
1979	107402.763
1980	118084.734
1981	121242.021
1982	123574.233
1983	122389.792
1984	128051.64
1985	135800.011
1986	134567.899
1987	147512.409
1988	150625.692
1989	161923.719
1990	143001.999
1991	147563.747
1992	151241.748
1993	152459.192
1994	151150.073
1995	153188.925
1996	166089.431
1997	173867.138
1998	185403.52
1999	189660.907
2000	189976.269
2001	193544.26
2002	198058.337
2003	189440.887
2004	196169.832
2005	202733.762
2006	209396.701
2007	207390.852
2008	208267.265
2009	215168.559
2010	206294.419
2011	199070.429
2012	195443.766
2013	174835.226
2014	163449.191
2015	169199.047
2016	172598.356