Year	Number
1961	792.0248667850799
1962	879.1671624033313
1963	987.312801932367
1964	1073.6511768255884
1965	1155.0060240963855
1966	1275.7116336633662
1967	1361.64375
1968	1432.2860712054967
1969	1510.9526813880127
1970	1569.8612862547288
1971	1630.0189035916824
1972	1690.5100755667504
1973	1833.7582562747689
1974	1878.560105680317
1975	1919.2587690271341
1976	1934.2105263157894
1977	2012.0143884892086
1978	2023.2708468002584
1979	2087.3276428102427
1980	2083.984375
1981	2080.6972240154937
1982	2124.1693811074915
1983	2265.879082696317
1984	2256.470588235294
1985	2251.795580110497
1986	2265.879082696317
1987	2265.879082696317
1988	2410.4526748971193
1989	2408.8005483207676
1990	2373.646563814867
1991	2352.9411764705883
1992	2374.651810584958
1993	2415.898520084567
1994	2424.455375966268
1995	2517.807637906648
1996	2517.7304964539007
1997	2506.2233285917496
1998	2450.1424501424503
1999	2394.636233951498
2000	2394.7676912080055
2001	2410.4397981254506
2002	2408.8664259927796
2003	2412.4692941457797
2004	2408.671065032988
2005	2401.15883247628