Year	kt
1960	337838.425243189
1961	378217.624289164
1962	447388.947872269
1963	526611.835864223
1964	610902.431251044
1965	684433.974640282
1966	759883.595492313
1967	838603.381198943
1968	923035.474103512
1969	1007084.99964528
1970	1154546.37573297
1971	1241887.02872456
1972	1355132.20876148
1973	1470332.15080284
1974	1420215.82627634
1975	1323798.36955371
1976	1457476.83928307
1977	1391947.76661976
1978	1469624.6632141
1979	1519023.01885425
1980	1456627.85417659
1981	1325449.17392743
1982	1249664.15155185
1983	1197671.674753
1984	1145411.92486508
1985	1131854.36640538
1986	1158848.94840224
1987	1185246.09643528
1988	1188191.34106395
1989	1238433.44116177
1990	1197603.54631853
1991	1237159.96350205
1992	1239724.692
1993	1239677.021
1994	1227883.949
1995	1256343.536
1996	1292368.144
1997	1280960.107
1998	1312070.935
1999	1286552.282
2000	1258811.427
2001	1306005.717
2002	1292445.151
2003	1290024.931
2004	1286548.615
2005	1272155.64
2006	1258356.719
2007	1205914.952
2008	1203557.071
2009	1141405.088
2010	1115255.711
2011	1073547.253
2012	1021754.545
2013	1006936.198
2014	993291.291