Year	kt
1960	10245.598
1961	11910.416
1962	13930.933
1963	16787.526
1964	18349.668
1965	19651.453
1966	22544.716
1967	23428.463
1968	20062.157
1969	20047.489
1970	23300.118
1971	23560.475
1972	24539.564
1973	28782.283
1974	29559.687
1975	30703.791
1976	33824.408
1977	37091.705
1978	36380.307
1979	46039.185
1980	49464.163
1981	55126.011
1982	57359.214
1983	61458.92
1984	75250.507
1985	89397.793
1986	88103.342
1987	89742.491
1988	98620.298
1989	97853.895
1990	94850.622
1991	96515.44
1992	86959.238
1993	97182.834
1994	100494.135
1995	105033.881
1996	110912.082
1997	122587.81
1998	124791.677
1999	130680.879
2000	160236.899
2001	170526.501
2002	178043.851
2003	184035.729
2004	192403.823
2005	187112.342
2006	199532.471
2007	213573.414
2008	239037.062
2009	245740.338
2010	279656.421
2011	304900.049
2012	292498.255
2013	296047.911
2014	308618.387
2015	308270.022
2016	309945.841