Year	Percent
1989	31.95125
1990	23.96638
1991	38.75321
1992	51.3924
1993	99.40183
1994	86.64924
1995	82.86796
1996	52.82991
1997	15.23916
1998	30.13171
1999	45.13857
2000	23.11644
2001	29.87876
2002	33.88241
2003	78.15648
2004	66.73996
2005	65.43732
2006	63.20447
2007	74.97048
2008	35.39267
2009	62.81496
2010	81.42118
2011	72.40433
2012	98.03758
2013	84.30618
2014	105.66782
2015	86.89549
2016	105.14894
2017	120.55584