Year	kt
1960	1887156.5572493863
1961	1878151.798428362
1962	1894360.364306206
1963	1979767.920741791
1964	2055230.0938680412
1965	2117936.4812503695
1966	2187766.3784771007
1967	2214895.3652436254
1968	2224777.6578860614
1969	2281983.686217841
1970	2389616.363947355
1971	2437645.568002932
1972	2523047.388923344
1973	2553204.7277010162
1974	2573950.086080407
1975	2674476.4605110367
1976	2756775.3677230584
1977	2816946.657399086
1978	2828520.9270174466
1979	2859355.0565854884
1980	3007732.8341013426
1981	2747019.2564144204
1982	2802883.1741958056
1983	2812828.5575051405
1984	2834979.117101825
1985	3160670.3461794364
1986	3241369.044658296
1987	3279166.0896459064
1988	3282372.242627405
1989	3140802.521621458
1990	2652107.9513377934
1991	2414170.104401372
1992	1643982.1849603578
1993	1502233.798388671
1994	1359324.00129212
1995	1319745.0659032888
1996	1298482.857772624
1997	1181758.5398462403
1998	1131280.554160874
1999	1130293.5833845583
2000	1132791.8702050813
2001	1105761.7947441444
2002	1107820.5681425387
2003	1145081.1387606119
2004	1133776.912193632
2005	1129497.3448371016
2006	1197621.955495019
2007	1187294.9033243433
2008	1211797.4845330908
2009	1069665.7306242876
2010	1136846.7396013134
2011	1183609.3669090632
2012	1237938.1155036837
2013	1181584.578091099
2014	1121755.0274695994
2015	1140848.0684957516
2016	1152508.1856129724