Year	Number
1961	42488
1962	43343
1963	50034
1964	51386
1965	52964
1966	63999
1967	73874
1968	84345
1969	95709
1970	104640
1971	117639
1972	134833
1973	155710
1974	200082
1975	242456
1976	281479
1977	320022
1978	369420
1979	401935
1980	435283
1981	457425
1982	489813
1983	512282
1984	555227
1985	582291
1986	611052
1987	635526
1988	652702
1989	670350
1990	689650
1991	701074
1992	725933
1993	746283
1994	763529
1995	776863
1996	807303
1997	874995
1998	902513
1999	924471
2000	941835
2001	937641
2002	951400
2003	983626
2004	994061
2005	1006196
2006	1022546
2007	1039120
2008	1052975