Year	Measure
1971	0.00166
1972	0.00161
1973	0.00226
1974	0.00301
1975	0.00336
1976	0.00324
1977	0.00387
1978	0.00469
1979	0.00664
1980	0.00432
1981	0.00372
1982	0.00357
1983	0.00349
1984	0.00347
1985	0.00339
1986	0.00326
1987	0.01383
1988	0.01353
1989	0.01321
1990	0.01287
1991	0.00433
1992	0.00327
1993	0.00271
1994	0.00245
1995	0.00242
1996	0.00234
1997	0.0023
1998	0.00228
1999	0.00225
2000	0.0022
2001	0.00216
2002	0.00176
2003	0.00144
2004	0.00159
2005	0.01886
2006	0.01863
2007	0.01703
2008	0.01005
2009	0.00903
2010	0.01294