Year	Number
1961	379.16964194634295
1962	411.89861751152074
1963	445.9912618864046
1964	499.3804382010693
1965	530.1244945733135
1966	569.3403022260738
1967	612.255476875415
1968	670.4914955344445
1969	688.307998861372
1970	706.3214101165528
1971	749.1791744840525
1972	767.6631232747989
1973	772.6953673373889
1974	773.9321680750087
1975	786.3924306236659
1976	801.1207752028487
1977	810.5786272806256
1978	814.2684262087247
1979	818.6311131544164
1980	843.4065934065934
1981	847.0843318498231
1982	846.1843521613506
1983	846.1146641009678
1984	837.4417429389634
1985	832.0035708307762
1986	825.0361151239026
1987	815.2694445973468
1988	828.2714871161511
1989	823.2683414361459
1990	809.6801763303495
1991	790.7443652453832
1992	778.8467464937888
1993	754.1394492563963
1994	734.9609310241929
1995	721.7810940345895
1996	708.5965394122494
1997	700.0509028412542
1998	695.4907741019763
1999	691.4363241087336
2000	688.6632088218629
2001	688.9822794193799
2002	688.0222083117873
2003	672.6578333732865
2004	656.1955574912892
2005	640.1407147832143