Year	Number
1961	48905
1962	53507
1963	58698
1964	61620
1965	65485
1966	78684
1967	85235
1968	88928
1969	97243
1970	99009
1971	97628
1972	98397
1973	100987
1974	103059
1975	104173
1976	109817
1977	109970
1978	109706
1979	113605
1980	116603
1981	116800
1982	117000
1983	117300
1984	117500
1985	117700
1986	117925
1987	117800
1988	117677
1989	117429
1990	116684
1991	116635
1992	113480
1993	112873
1994	109789
1995	109327
1996	106314
1997	107664
1998	106070
1999	104971
2000	96271
2001	96000
2002	96000
2003	95986
2004	95498
2005	95010