Year	Percent
1995	6.199
1996	8.84811
1997	9.13126
1998	11.6982
1999	13.4989
2000	29.93045
2001	19.28104
2002	11.86431
2003	12.6571
2004	13.99566
2005	14.66002
2006	12.62826
2007	5.80162
2008	5.40151
2009	5.67979
2010	9.26532
2011	13.38765
2012	10.75136
2013	10.54693
2014	11.43989
2015	11.39249
2016	10.34384