Year	Measure
1971	0.00199
1972	0.00185
1973	0.00162
1974	0.00555
1975	0.00423
1976	0.00482
1977	0.00478
1978	0.006
1979	0.00309
1980	0.00213
1981	0.00039
1982	0.00171
1983	0.00156
1984	0.00159
1985	0.00242
1986	0.00111
1987	0.00116
1988	0.00107
1989	0.00183
1990	0.0018
1991	0.002
1992	0.00195
1993	0.00199
1994	0.00204
1995	0.00204
1996	0.00235
1997	0.00498
1998	0.03399
1999	0.03726
2000	0.0456
2001	0.05447
2002	0.05676
2003	0.04739
2004	0.04955
2005	0.05491
2006	0.05944
2007	0.06332
2008	0.05819
2009	0.06376
2010	0.06119