Year	kt
1960	2720621.6083179074
1961	2708500.335338316
1962	2761247.697311419
1963	2890904.946783119
1964	2951096.0438475595
1965	2993407.2886786163
1966	2998160.459533689
1967	3005580.492126276
1968	2991910.995857367
1969	3037380.0074452106
1970	3015686.290300215
1971	2831530.1329541868
1972	2773538.5259016855
1973	2910894.5217691585
1974	2882998.5554717886
1975	2811313.828943638
1976	2997494.9281190103
1977	3022049.0828170716
1978	3090722.361690982
1979	3272485.689858308
1980	3400189.201948445
1981	3471099.540488248
1982	3412886.320411607
1983	3499255.046671429
1984	3614855.4661068516
1985	3814474.253498359
1986	3707804.158767549
1987	3867174.4441116364
1988	3998837.59834064
1989	4086679.1162370243
1990	4012072.8275819873
1991	4017751.137416988
1992	3940998.6847239127
1993	3871860.0958830235
1994	3819146.189592664
1995	3811311.97578783
1996	3864898.2650719984
1997	3869880.2186591877
1998	3866954.1928603738
1999	3853245.560071453
2000	4043958.5615406716
2001	4033803.7467859443
2002	4076346.7668068362
2003	4128670.129021003
2004	4199797.318669536
2005	4177564.106090227
2006	4216233.595538353
2007	4260861.556587569
2008	4159145.343291286
2009	3727091.904982857
2010	3926647.4702009647
2011	3846437.557976276
2012	3701954.717642944
2013	3705269.874670538
2014	3607500.2768832953
2015	3664313.00709983
2016	3422714.621901468