Year	Percent
1995	14.85
1996	12.39
1997	13.75
1998	15.76
1999	16
2000	17.3
2001	14.86
2002	12.86
2003	10.1
2004	8.032
2005	6.796
2006	6.582
2007	7.942
2008	7.512
2009	7.278
2010	8.127