1961    0.0008407
1962    0.0008601
1963    0.0008795
1964    0.0008989
1965    0.0009183
1966    0.0009378
1967    0.0009572
1968    0.0009766
1969    0.0009960
1970    0.0010348
1971    0.0010591
1972    0.0010465
1973    0.0010524
1974    0.0010582
1975    0.0010641
1976    0.0010699
1977    0.0010758
1978    0.0010816
1979    0.0010875
1980    0.0010933
1981    0.0010992
1982    0.0011050
1983    0.0011109
1984    0.0011167
1985    0.0011226
1986    0.0011284
1987    0.0011343
1988    0.0011401
1989    0.0011460
1990    0.0011519
1991    0.0011577
1992    0.0011636
1993    0.0011694
1994    0.0011753
1995    0.0011811
1996    0.0011870
1997    0.0011928
1998    0.0011987
1999    0.0012045
2000    0.0012104
2001	0.0012239
2002	0.0012347
2003	0.0012654
2004	0.0012762
2005	0.0012870
2006	0.0012977
2007	0.0013085
2008	0.0013192
2009	0.0013200
2010	0.0013407
2011	0.0013515
2012	0.0013722
2013	0.0013830
2014	0.0013938
2015	0.0014000