Year	Percent
1992	3.188
1994	4.133
1995	10.52
1996	11.37
1997	16.26
1998	8.052
1999	5.975
2000	4.458
2001	5.25
2002	4.898
2003	4.995
2004	7.042
2005	5.549
2006	5.607
2007	4.249