Year	Measure
1971	0.00337
1972	0.004
1973	0.00294
1974	0.00314
1975	0.00321
1976	0.00338
1977	0.0025
1978	0.00056
1979	0.00379
1980	0.00478
1981	0.00478
1982	0.00784
1983	0.01016
1984	0.01067
1985	0.01202
1986	0.01076
1987	0.01086
1988	0.01098
1989	0.01468
1990	0.01764
1991	0.01682
1992	0.01447
1993	0.01193
1994	0.01041
1995	0.01108
1996	0.01395
1997	0.01341
1998	0.00989
1999	0.00267
2000	0.00809
2001	0.00894
2002	0.01035
2003	0.00874
2004	0.00823
2005	0.00864
2006	0.00881
2007	0.00772
2008	0.0084
2009	0.0072
2010	0.00915