Year	kt
1960	5169314.428408689
1961	4893678.205881724
1962	4842290.5823094025
1963	5034904.973296437
1964	5145287.98070479
1965	5300023.16017862
1966	5404300.835669278
1967	5340392.558168693
1968	5391960.789400257
1969	5590528.70944939
1970	5871023.287404659
1971	5877639.369913617
1972	5912941.1244548885
1973	6095738.008523849
1974	6101505.767033327
1975	6304055.973996319
1976	6570607.5185626745
1977	6775440.635082417
1978	6985914.86605724
1979	7255164.296783573
1980	7497435.139729625
1981	7409289.181216944
1982	7578180.605720214
1983	7817496.773391202
1984	8155635.635967722
1985	8820092.794238452
1986	8936106.775531992
1987	9317954.158626793
1988	9675785.230141187
1989	9718120.436151855
1990	9267921.21197941
1991	9255189.091540607
1992	8689147.112403527
1993	8697606.931071158
1994	8781387.686475
1995	8969335.911191316
1996	9196722.32651271
1997	9132006.525537627
1998	8890822.056202082
1999	8882148.7852048
2000	9156057.923545081
2001	9204181.262218095
2002	9639691.147751661
2003	10387764.024433328
2004	11121108.7995952
2005	11788637.767766606
2006	12498312.59855243
2007	12729481.909003962
2008	13603435.425395656
2009	12946899.786277456
2010	14220608.140186928
2011	15144867.739460556
2012	15363091.01964013
2013	15218140.750055518
2014	15190269.745667815
2015	15844904.853150763
2016	15386666.216147231