Year	kt
1960	2196000.6446578484
1961	1940026.0323611929
1962	1831673.9471547888
1963	1883389.9150510198
1964	1929157.2658364554
1965	2015519.9640136661
1966	2109213.73303897
1967	2036862.1916659107
1968	2083040.4795929547
1969	2225148.8587719416
1970	2497998.442542064
1971	2649805.1785050104
1972	2723071.475022953
1973	2768989.466397454
1974	2782330.163045267
1975	3005974.5596899088
1976	3072185.954613119
1977	3222881.5280989967
1978	3358479.8951644683
1979	3414818.9450328057
1980	3497028.7389370073
1981	3311762.9365113233
1982	3486994.3401364605
1983	3587797.1093181325
1984	3760310.851396593
1985	4152271.632510574
1986	4298769.540970706
1987	4477940.165304152
1988	4651109.704008201
1989	4589838.403540614
1990	4209477.252498463
1991	4131616.5758194746
1992	3640347.4584623855
1993	3652429.0168999634
1994	3740566.2968846876
1995	3899105.102550976
1996	3999925.486989003
1997	3871214.5980860186
1998	3625053.5453987233
1999	3573280.085946216
2000	3590867.160015244
2001	3626552.2942602523
2002	3989496.93984883
2003	4589423.642625631
2004	5150983.144961139
2005	5761123.229778376
2006	6313182.046151039
2007	6358358.112734365
2008	7199336.614790969
2009	6922138.271967395
2010	7999184.639219252
2011	8812765.98917058
2012	9025959.378505966
2013	9034730.2442969
2014	8933547.130985053
2015	8832973.864914058
2016	8489247.424068732