Year	Percent
1995	18.63
1996	14.77
1997	8.799
1998	13.39
1999	13.2
2000	14.01
2001	18.28
2002	20.49
2003	18.22
2004	17.26
2005	19.86
2006	22.18
2007	23.58
2008	27.45
2009	26.9
2010	19.85