Year	Percent
1995	4.748
1996	5.491
1997	4.963
1998	4.998
1999	5.011
2000	5.125
2001	5.656
2002	5.784
2003	5.892
2004	5.779
2005	5.998
2006	7.282
2007	7.241
2008	8.089
2009	8.431
2010	8.7