Year	Measure
1990	0.0175
1991	0.01949
1992	0.01313
1993	0.01841
1994	0.02028
1995	0.01674
1996	0.01462
1997	0.01683
1998	0.02714
1999	0.02495
2000	0.01983
2001	0.02135
2002	0.01723
2003	0.01667
2004	0.02138
2005	0.02265
2006	0.02378
2007	0.01884
2008	0.02128
2009	0.02245
2010	0.02488