Year	Number
1961	459.08443177769857
1962	493.0111792282727
1963	531.4832361516035
1964	573.5289801907558
1965	600.5718529520981
1966	619.102755026061
1967	638.2867783985103
1968	644.8960653303637
1969	649.1896938013442
1970	656.2908680947013
1971	653.5700793350964
1972	651.9954734062618
1973	673.8484734263099
1974	691.6319575918213
1975	698.1132075471697
1976	687.3089951072639
1977	725.5631399317406
1978	718.5508891411275
1979	718.1907645722937
1980	717.7946191739295
1981	687.7095183921123
1982	696.3307984790874
1983	678.7504820671037
1984	649.7358346094946
1985	639.4232987312572
1986	649.8612181958365
1987	639.833204034135
1988	655.36328125
1989	651.8978388998036
1990	634.7325263568919
1991	629.4623233908948
1992	610.5986608901143
1993	610.5329648637979
1994	619.7589852008457
1995	651.4877102199224
1996	601.287683031869
1997	597.4334038054968
1998	549.4505494505495
1999	563.9799476896252
2000	540.2060499780798
2001	529.0357766143106
2002	524.1212653778559
2003	517.7625772285967
2004	508.41780520052885
2005	486.28644939965693