Year	kt
1992	68730.581
1993	48686.759
1994	46603.903
1995	33894.081
1996	24711.913
1997	30483.771
1998	27957.208
1999	22060.672
2000	22368.7
2001	29211.322
2002	27143.134
2003	23648.483
2004	33864.745
2005	28118.556
2006	31869.897
2007	42632.542
2008	34975.846
2009	27711.519
2010	47381.307
2011	37623.42
2012	32394.278
2013	47538.988
2014	32339.273
2015	44774.07
2016	42691.214