Year	Percent
1995	9.16475
1996	13.56072
1997	19.80123
1998	12.81389
1999	9.70343
2000	10.92197
2001	21.79662
2002	16.98568
2003	20.47675
2004	26.69742
2005	26.40162
2006	15.36539
2007	22.31188
2008	13.92621
2009	10.30211
2010	21.61801
2011	16.74693
2012	19.44406
2013	22.05048
2014	18.61134