Year	kt
2008	21403.203230501666
2009	20433.701698030924
2010	26303.689118673454
2011	30604.654798166575
2012	25954.103238320564
2013	30917.16338817901
2014	33152.77732748874
2015	32665.392298065755
2016	33152.69829635051