Year	kt
1960	2395436.4948389055
1961	2125895.4112317227
1962	2015416.3240050331
1963	2072668.3424667502
1964	2119906.0160510694
1965	2236632.975852065
1966	2330261.3587677525
1967	2255100.077610438
1968	2300712.9785386254
1969	2439413.6993629946
1970	2727659.958357693
1971	2896774.6054087295
1972	2969895.8349219374
1973	3021719.0348030226
1974	3042144.98314552
1975	3286016.500091682
1976	3356521.469666598
1977	3517865.690924782
1978	3649500.132401918
1979	3732969.682313682
1980	3828461.5478560645
1981	3724210.7018801034
1982	3931452.1564753065
1983	4065827.234425051
1984	4268672.291670422
1985	4725009.810911899
1986	4924402.741132945
1987	5132138.370305348
1988	5366086.9192384705
1989	5344960.146431207
1990	5062703.203572496
1991	5051824.905583489
1992	4531292.896760494
1993	4579708.187115804
1994	4666095.289545456
1995	4858049.114983354
1996	4978339.820115472
1997	4863119.854518962
1998	4652301.325794341
1999	4666122.174187681
2000	4746801.499268384
2001	4797705.670782422
2002	5187794.390927458
2003	5886826.6311411215
2004	6535249.120351759
2005	7234680.460959077
2006	7896586.383018076
2007	8074154.254665951
2008	9068127.573758792
2009	8867986.268733228
2010	9929380.619753536
2011	10947716.33010075
2012	11347159.378384309
2013	11178437.927656647
2014	11235207.600485634
2015	11213246.548749715
2016	11007940.185638806