Year	Number
1961	258.0504070263609
1962	281.83786099730406
1963	308.90911221341247
1964	336.43151683103184
1965	361.080635999771
1966	387.57877348089875
1967	409.44730387121325
1968	433.3120593705364
1969	456.05179159106973
1970	476.164694466452
1971	507.2047287623327
1972	525.5277968825385
1973	544.9996762390425
1974	561.931803239271
1975	580.2802472925309
1976	597.9647260749516
1977	617.4863129716731
1978	632.0536877547805
1979	652.4577460462963
1980	677.4118711140522
1981	693.0205433886199
1982	707.9689833003796
1983	723.7372138310919
1984	732.0143361540956
1985	750.0502380598974
1986	763.1456126770877
1987	773.0056261436121
1988	786.870650000286
1989	798.2043944224638
1990	798.9329222851637
1991	802.4261533933814
1992	759.7484454211041
1993	739.5780790638432
1994	755.5873048539488
1995	766.9922406357344
1996	762.6883230373024
1997	760.9235585331026
1998	766.4927180971305
1999	766.4184387888452
2000	772.1174587635519
2001	792.2334663244984
2002	813.7288647836675
2003	697.4506669428066
2004	698.1326819010721
2005	708.1048711411586