Year	Percent
1990	1.228
1991	1.333
1992	3.227
1993	6.258
1994	6.589
1995	9.223
1996	7.258
1997	7.165
1998	6.359
1999	9.007
2000	11.19
2001	10.02
2002	7.862
2003	10.27
2004	10.17
2005	12.06
2006	13.15
2007	9.936
2008	5.628
2009	4.589
2010	5.003