Year	Percent
1990	0.7115
1991	0.8381
1992	1.125
1993	1.511
1994	1.044
1995	1.03
1996	1.089
1997	0.8926
1998	1.217
1999	0.9684
2000	1.319
2001	1.386
2002	1.384
2003	1.18
2004	1.278
2005	1.337
2006	1.362
2007	1.209
2008	1.272
2009	1.437
2010	1.362