Year	Percent
1995	5.215
1996	11.67
1997	18.66
1998	18.26
1999	18.12
2000	17.01
2001	17.76
2002	16.05
2003	14.82
2004	15.32
2005	19.17
2006	21.11
2007	17.75
2008	19.79
2009	22.27
2010	23.64