Year	kt
1960	177835.91460168295
1961	213638.67580110158
1962	231820.14426879404
1963	271814.310582125
1964	313749.30012082524
1965	357265.163295724
1966	397662.79314583266
1967	474110.86874031223
1968	557235.632159637
1969	667334.9480932967
1970	855456.1303230062
1971	948617.9365383626
1972	1041783.4112635127
1973	1136563.030297966
1974	1135807.3172804292
1975	1142230.8779294975
1976	1244974.8317264447
1977	1318796.254308513
1978	1363955.6098710657
1979	1407955.7163387556
1980	1362726.6590901192
1981	1299756.6884783222
1982	1276454.3142676533
1983	1286157.5226724418
1984	1290302.9387395163
1985	1259425.0918045032
1986	1306125.221480482
1987	1330957.3642751959
1988	1453713.0389977102
1989	1536687.3935154865
1990	1574553.7516078241
1991	1629469.4240241882
1992	1750239.8827610977
1993	1829472.44134458
1994	1898357.0810500986
1995	1973107.130995201
1996	2076303.870376177
1997	2151816.900515045
1998	2025033.8022594491
1999	2087385.424055839
2000	2202694.474012865
2001	2158298.563988056
2002	2166559.2918551853
2003	2232977.638910387
2004	2363151.4370652973
2005	2359116.7462236406
2006	2317442.0577300894
2007	2339266.0672826893
2008	2366782.6588227903
2009	2336848.92067846
2010	2537681.159173077
2011	2576619.5936958306
2012	2656517.4760629316
2013	2717452.3114742446
2014	2713542.329258601
2015	2769782.2516905344
2016	2778999.6863133376