Year	Percent
1989	327.06175
1990	384.01166
1991	257.05552
1992	255.31828
1993	190.61657
1994	156.22283
1995	123.98006
1996	108.18928
1997	82.63791
1998	84.08564
1999	82.23744
2000	38.51729
2001	36.08911
2002	35.48876
2003	36.86826
2004	36.16366
2005	32.75369
2006	28.77234
2007	30.66115
2008	27.48514
2009	32.23585
2010	40.26585
2011	41.54748
2012	41.16936
2013	39.93782
2014	40.8376
2015	42.45427
2016	45.55726