Year	Percent
1995	5.529
1996	5.811
1997	6.361
1998	5.635
1999	5.785
2000	7.563
2001	9.736
2002	10.58
2003	10.05
2004	17.3
2005	16.9
2006	16.35
2007	18.4
2008	16.56
2009	16.99
2010	16.99