Year	Percent
1976	7.32
1977	8.22
1978	3.24
1979	3.73
1995	3.33
1996	3.45
1997	2.7
1998	2.94
1999	3.03
2002	2.7
2003	2.44
2005	2.56
2006	2.17
2007	2.33
2008	2.44