Year	kt
1960	53016.40838027159
1961	57589.97549619424
1962	65890.37370397041
1963	73039.92647058223
1964	81698.10046317635
1965	91232.82512857442
1966	98960.78208064192
1967	110988.01138027161
1968	126062.29778060075
1969	143545.60779870403
1970	164427.78777257775
1971	181004.73246914227
1972	192709.96356243585
1973	214540.24936607713
1974	219566.99914276914
1975	233019.36865192364
1976	252512.18599475437
1977	274551.17433953943
1978	299130.3707565318
1979	294354.0640292123
1980	284878.96866128384
1981	260949.73158671072
1982	265606.77971909085
1983	263549.56895638775
1984	253388.73666755835
1985	254205.65804289255
1986	262070.76237914024
1987	272034.81798631983
1988	251522.339656758
1989	252542.00064348907
1990	224158.4550479326
1991	190056.45982503606
1992	173914.80900000007
1993	189594.901
1994	175711.63900000008
1995	181894.20100000003
1996	181223.14000000007
1997	179503.31700000004
1998	179459.31300000005
1999	169580.41500000007
2000	157105.2810000001
2001	169562.08000000007
2002	169257.71900000007
2003	170354.15200000006
2004	171597.26500000004
2005	174956.23700000008
2006	180889.44300000006
2007	182953.9640000001
2008	183665.36200000002
2009	173390.42799999999
2010	174050.488
2011	171391.913
2012	166129.768
2013	155576.142
2014	157475.648
2015	166129.768
2016	176467.041