Year	kt
1990	27695.208097
1991	27978.372072
1992	28528.882047000003
1993	26203.362022
1994	24806.982796999997
1995	25222.981167
1996	26225.193537000003
1997	27077.785906999998
1998	28405.224276999998
1999	28791.492647
2000	28485.22
2001	30033.96
2002	30811.46
2003	34223.46
2004	35110.06
2005	36627.06
2006	40350.770000000004
2007	41066.58
2008	38498.490000000005
2009	35974.17
2010	38301.47
2011	39660.78
2012	39118.25
2013	40477.58
2014	40085.4586
2015	39284.4
2016	37223.056
2017	36313.3
2018	37801.5
2019	37614.99
2020	32776.990000000005