Year	Percent
1990	58.36059
1991	48.80853
1992	53.06401
1993	70.50324
1994	75.99093
1995	53.229
1996	45.27823
1997	60.476
1998	78.79988
1999	59.57416
2000	36.45742
2001	26.64334
2002	72.84321
2003	43.30621
2004	53.5502
2005	59.42835
2006	56.18075
2007	58.1642
2008	87.80062
2009	52.76543
2010	71.52572
2011	70.85948
2012	55.70755
2013	55.27189
2014	60.03928
2015	104.20452
2016	77.21625
2017	100.92794