Year	Measure
1971	0.00354
1972	0.00359
1973	0.0033
1974	0.00481
1975	0.00417
1976	0.00436
1977	0.00334
1978	0.00428
1979	0.00543
1980	0.00455
1981	0.00612
1982	0.00446
1983	0.00596
1984	0.00517
1985	0.00777
1986	0.00842
1987	0.01105
1988	0.00728
1989	0.00927
1990	0.01273
1991	0.00691
1992	0.00609
1993	0.00825
1994	0.00455
1995	0.00531
1996	0.00464
1997	0.00535
1998	0.00809
1999	0.00782
2000	0.0075
2001	0.00772
2002	0.00599
2003	0.00904
2004	0.00795
2005	0.00671
2006	0.00631
2007	0.00657
2008	0.00553
2009	0.00504
2010	0.00657
2011	0.00839