Year	Measure
1960	0.00162
1961	0.00176
1962	0.00151
1963	0.00133
1964	0.00105
1965	0.00248
1966	0.00271
1967	0.00215
1968	0.0022
1969	0.00206
1970	0.0022
1971	0.00119
1972	0.0016
1973	0.00151
1974	0.00211
1975	0.00161
1976	0.00096
1977	0.00196
1978	0.00195
1979	0.00204
1980	0.00243
1981	0.00333
1982	0.00291
1983	0.00294
1984	0.00307
1985	0.00251
1986	0.00299
1987	0.00374
1988	0.00312
1989	0.00264
1990	0.0023
1991	0.00197
1992	0.00293
1993	0.00218
1994	0.00296
1995	0.00288
1996	0.00203
1997	0.00259
1998	0.0033
1999	0.00289
2000	0.00389
2001	0.00371
2002	0.00302
2003	0.00206
2004	0.00263
2005	0.00238
2006	0.00295
2007	0.00317
2008	0.00332
2009	0.00265
2010	0.0025
2011	0.00159