Year	Percent
1995	20.46
1996	18.86
1997	20.26
1998	16.8
1999	18.39
2000	18.66
2001	21.48
2002	21.29
2003	24.17
2004	16.89
2005	11.3
2006	12.79
2007	8.024
2008	13.87
2009	8.187
2010	11.29