Year	kt
1960	1282679.93
1961	1298378.357
1962	1335840.429
1963	1360368.992
1964	1395058.812
1965	1465890.584
1966	1530913.828
1967	1590495.244
1968	1690806.029
1969	1783086.084
1970	2039750.415
1971	2099023.803
1972	2271031.772
1973	2401448.627
1974	2301790.568
1975	2236565.639
1976	2301313.858
1977	2444719.227
1978	2494601.428
1979	2422302.856
1980	2218523.999
1981	2037201.85
1982	1930701.169
1983	1928189.274
1984	1959443.115
1985	1963084.446
1986	2046846.06
1987	2097883.366
1988	2181681.65
1989	2174523.666
1990	1993879.912
1991	1961294.95
1992	2006245.036
1993	2047187.091
1994	2076284.736
1995	2076156.391
1996	2134454.357
1997	2188656.284
1998	2236224.608
1999	2267434.445
2000	2318017.043
2001	2327815.267
2002	2304383.137
2003	2376461.689
2004	2428170.056
2005	2446413.381
2006	2394921.367
2007	2377235.426
2008	2242168.815
2009	2152257.642
2010	2166283.917
2011	2091649.466
2012	2041968.95
2013	2073013.772
2014	2077395.837
2015	2132547.517
2016	2127054.351