Year	Percent
1993	0.63259
1994	0.73628
1995	0.90293
1996	0.8593
1997	1.04373
1998	1.44772
1999	2.34887
2000	2.87288
2001	2.59428
2002	2.33056
2003	2.18515
2004	2.69965
2005	2.64339
2006	2.41428
2007	1.69984
2008	1.37514
2009	1.69994
2010	2.3874
2011	2.03249
2012	2.14908
2013	2.10976
2014	1.83681
2015	1.56991
2016	1.14111
2017	0.7527