Year	Percent
1995	10.5
1996	8.17
1997	8.948
1998	7.706
1999	6.114
2000	6.506
2001	7.356
2002	7.391
2003	8.501
2004	8.046
2005	9.295
2006	9.246
2007	10.61
2008	10.5
2009	11.77
2010	11.35