Year	kt
1961	2916.1718394976747
1962	3607.355045130945
1963	4515.989146918503
1964	5684.787713747796
1965	7001.142245824644
1966	7902.01024417812
1967	9346.505482917317
1968	10757.156431509355
1969	13328.417254274924
1970	11018.57445142634
1971	11901.436296129597
1972	7957.222340572197
1973	9199.343983552968
1974	10582.876398196164
1975	11236.42347804143
1976	12505.298510255632
1977	14018.775958318356
1978	14393.323407586406
1979	15723.349043762737
1980	17133.634847639365
1981	19843.37098571126
1982	22702.161720940847
1983	24987.665544025465
1984	27296.100843595887
1985	30196.932619049436
1986	34920.816775124
1987	37427.99153757134
1988	42652.54626358584
1989	49405.866088653594
1990	54443.14709003407
1991	59449.85278943349
1992	65446.43389046988
1993	67475.86955946307
1994	72337.34257445243
1995	83982.71071649059
1996	87575.30869926575
1997	95742.73624095776
1998	98639.7461036637
1999	96640.88573665157
2000	101540.57787911726
2001	104869.46388230572
2002	117179.84484243207
2003	132219.07150436848
2004	139442.48659739512
2005	144980.43816871554
2006	147896.55759515963
2007	153893.13869619605
2008	168274.99636553953
2009	202228.86921551236
2010	223967.90892404967
2011	219652.96943197187
2012	205194.67350767567
2013	230904.68056100383
2014	222630.2394623781
2015	232976.15727022098
2016	234218.27891320176