Year	Percent
1984	30.80921
1985	21.456
1986	32.94145
1987	48.85223
1988	86.74966
2000	100.58488
2001	85.42808
2002	45.90057
2003	45.1444
2004	30.73865
2005	25.89841
2006	29.57324
2007	25.21554
2008	26.50709
2009	18.83782
2010	19.87223
2011	15.14477
2012	12.39621
2013	11.52688
2014	11.98819
2015	10.34798
2016	8.65411