Year	kt
1960	15560.840486869867
1961	16841.44554129169
1962	17883.798492565267
1963	20410.263503033133
1964	21929.12066060321
1965	24115.54756212512
1966	25662.722530574938
1967	28923.833841319487
1968	28242.89156478619
1969	27432.24599748462
1970	30480.27333053848
1971	31647.60294745271
1972	30948.13162938108
1973	33500.50710128484
1974	37053.45081625793
1975	39082.380864704115
1976	39388.11005008642
1977	37836.30282125201
1978	40976.975361997465
1979	47716.91422156182
1980	61961.11490414627
1981	69808.16399562532
1982	76529.57381365137
1983	79239.44613863085
1984	91524.20067853789
1985	92121.76226814874
1986	91047.0778589261
1987	81171.09871900086
1988	92367.2720685315
1989	101256.5797465411
1990	93539.2339458303
1991	93567.0275081378
1992	106704.11795880755
1993	111664.45322005414
1994	104086.26522655819
1995	103113.29050840101
1996	114855.07597506771
1997	118354.11335772353
1998	117755.6421159891
1999	120197.25791815713
2000	127540.46333821134
2001	131847.25331707313
2002	128708.03299999995
2003	117087.30999999997
2004	115906.53599999995
2005	122895.83799999997
2006	122081.76399999997
2007	122921.50699999998
2008	128139.64799999996
2009	124391.97399999997
2010	158161.3769999999
2011	168902.02
2012	156896.26200000002
2013	168252.961
2014	178003.514
2015	173185.07599999994
2016	185843.56