Year	Measure
1971	0.00994
1972	0.0104
1973	0.00932
1974	0.0086
1975	0.00713
1976	0.01273
1977	0.00726
1978	0.01157
1979	0.01257
1980	0.00828
1981	0.01983
1982	0.01188
1983	0.01303
1984	0.01563
1985	0.01517
1986	0.01799
1987	0.01951
1988	0.02054
1989	0.00578
1990	0.00417
1991	0.00594
1992	0.00612
1993	0.01272
1994	0.0059
1995	0.00656
1996	0.00921
1997	0.00698
1998	0.00757
1999	0.01117
2000	0.00763
2001	0.00686
2002	0.00845
2003	0.0114
2004	0.01507
2005	0.01771
2006	0.01601
2007	0.01534
2008	0.01231
2009	0.01485
2010	0.01553