Year	Measure
1971	0.00047
1972	0.00058
1973	0.00055
1974	0.00063
1975	0.00048
1976	0.00081
1977	0.00085
1978	0.00092
1979	0.00099
1980	0.00116
1981	0.00136
1982	0.00174
1983	0.00189
1984	0.00199
1985	0.00217
1986	0.00268
1987	0.0027
1988	0.00266
1989	0.0033
1990	0.00395
1991	0.00396
1992	0.0036
1993	0.00364
1994	0.00379
1995	0.00462
1996	0.00459
1997	0.00402
1998	0.00418
1999	0.00509
2000	0.00575
2001	0.00636
2002	0.00713
2003	0.00744
2004	0.00774
2005	0.00793
2006	0.00845
2007	0.00843
2008	0.00834
2009	0.00906
2010	0.0092