Year	kt
1990	17782.890115772
1991	20361.59682234008
1992	21187.21185937019
1993	23240.52717873729
1994	22822.358523618142
1995	22806.275113805867
1996	23509.646215446606
1997	24484.77433363036
1998	24623.31712637778
1999	27687.24427367647
2000	29616.92899201896
2001	28888.643852870948
2002	30453.154747972963
2003	39457.12920166636
2004	47630.10742636856
2005	49986.41952369046
2006	51132.466497649955
2007	53255.37473304528
2008	53182.58171126694
2009	48072.51158242635
2010	55630.99105012441
2011	68065.1264003877
2012	69555.24932735902
2013	69181.50514046394
2014	76005.97691675612
2015	79087.95618509203
2016	77020.23375138335