Year	kt
1964	18015.061939290244
1965	18118.103284986853
1966	18971.056646586552
1967	16085.898967081539
1968	16801.20930891192
1969	16520.807654914413
1970	18472.850416635072
1971	18879.287472594504
1972	15272.87415915165
1973	16578.05231068335
1974	15690.760146264867
1975	14033.687880271855
1976	18595.350987586287
1977	16520.308747041
1978	16360.250392398384
1979	17046.214769438146
1980	18372.41256504836
1981	17789.342844564562
1982	18749.38447575211
1983	20183.73238901446
1984	20509.460799595952
1985	22606.694601059236
1986	27582.795434398275
1987	31044.927587100297
1988	32730.28894856416
1989	33118.77902510498
1990	35215.48282055323
1991	33358.72877826254
1992	35072.65558653088
1993	31427.239540253253
1994	33407.66271544898
1995	25753.48685486387
1996	27262.760968218678
1997	24288.133416765413
1998	24256.185855546384
1999	25622.168987869267
2000	25570.24565243009
2001	24915.212805351282
2002	26888.29955203989
2003	27914.7839526451
2004	31903.75336654608
2005	32155.81462339238
2006	33952.25119996364
2007	39761.66302442124
2008	33072.03728716703
2009	30415.391659453642
2010	31607.68141405995
2011	32251.837959333825
2012	26906.53892525989
2013	30059.305122004098
2014	37221.04559430376
2015	37441.09907250291
2016	42850.41366387114