Year	Value
2009	3.25
2008	5.0875
2007	8.05
2006	7.9575
2005	6.18917
2004	4.34
2003	4.1225
2002	4.675
2001	6.92167
2000	9.23333
1999	7.99417
1998	8.35417
1997	8.44167
1996	8.27083
1995	8.82917
1994	7.13833
1993	6
1992	6.25167
1991	8.46333
1990	10.0092
1989	10.8733
1988	9.315
1987	8.20333
1986	8.3325
1985	9.93333
1984	12.0425
1983	10.7942
1982	14.8608
1981	18.87
1980	15.2658
1979	12.6658
1978	9.05667
1977	6.82417
1976	6.84
1975	7.8625
1974	10.7983
1973	8.02167
1972	5.24833
1971	5.72333
1970	7.91
1969	7.95167
1968	6.3125
1967	5.63333
1966	5.625
1965	4.535
1964	4.5
1963	4.5
1962	4.5
1961	4.5
1960	4.82083
1959	4.4775
1958	3.83333
1957	4.20167
1956	3.77
1955	3.15667
1954	3.0525
1953	3.16917
1952	3
1951	2.555
1950	2.06917
1949	2
1948	1.85417