Year	kt
1960	1398674.474
1961	1417313.8350000002
1962	1462388.5990000002
1963	1494900.2210000004
1964	1539098.5720000002
1965	1617942.7390000003
1966	1687069.3560000001
1967	1762338.198
1968	1870379.0190000003
1969	1964961.9500000002
1970	2251523.332
1971	2319762.5349999997
1972	2504795.688
1973	2640243.667
1974	2551362.921
1975	2479203.695
1976	2535708.498
1977	2679066.1959999995
1978	2729043.7389999996
1979	2667258.456
1980	2460454.3239999996
1981	2265685.286
1982	2139910.8529999997
1983	2122609.9469999997
1984	2152551.0019999994
1985	2150347.1349999993
1986	2233848.3919999995
1987	2300485.1159999995
1988	2393381.2269999995
1989	2382116.2029999997
1990	2200111.9919999996
1991	2154252.4899999993
1992	2204468.388
1993	2250111.5369999995
1994	2278673.8
1995	2282304.13
1996	2342296.25
1997	2404360.225
1998	2461070.38
1999	2495679.5259999996
2000	2549731.106
2001	2560028.042
2002	2529005.222
2003	2621886.6649999996
2004	2682128.141
2005	2699517.055
2006	2659037.0420000004
2007	2643023.253
2008	2500875.665
2009	2408511.269
2010	2417785.1119999997
2011	2336924.095
2012	2284306.312
2013	2315607.824
2014	2331372.257
2015	2402431.383
2016	2380205.696