Year	Percent
1982	0.02145
1983	0.04031
1984	0.05155
1985	0.20324
1986	0.14962
1987	0.23629
1988	0.27213
1989	0.22429
1990	0.23001
1991	0.23815
1992	0.93695
1993	0.98936
1994	0.35441
1995	0.27228
1996	0.24475
1997	0.39153
1998	0.43992
1999	0.36892
2000	0.38073
2001	0.72391
2002	0.42733
2003	0.50931
2004	0.40773
2005	0.6006
2006	0.86959
2007	0.48294
2008	1.23401
2009	0.85891
2010	0.94996
2011	0.63942
2012	0.75887
2013	0.75954
2014	1.17463
2015	1.5761
2016	1.93392
2017	0.83279