Year	Percent
1992	6.43367
1993	17.03296
1994	20.27809
1995	29.6815
1996	30.14342
1997	33.05214
1998	14.19482
1999	13.95547
2000	21.05027
2001	21.8281
2002	24.25645
2003	13.17777
2004	13.04166
2005	23.85835
2006	48.15469
2007	57.51641
2008	30.07437
2009	44.4456
2010	38.59285
2011	25.42765
2012	26.82034
2013	11.89804
2014	7.93134
2015	6.13902
2016	5.45375