Year	Number
1961	71577
1962	83341
1963	96021
1964	106789
1965	131000
1966	136689
1967	151168
1968	170863
1969	192723
1970	224531
1971	248387
1972	278761
1973	319204
1974	364763
1975	401219
1976	434043
1977	472613
1978	514460
1979	573149
1980	619353
1981	669671
1982	710199
1983	757283
1984	806491
1985	924642
1986	989503
1987	1043509
1988	1101264
1989	1152644
1990	1185000
1991	1178760
1992	1172140
1993	1155600
1994	1310690
1995	1319388
1996	1302908
1997	1310500
1998	1310510
1999	1305510
2000	1306700
2001	1308520
2002	1364579
2003	1371340
2004	1365400
2005	1437183
2006	1495287
2007	1553390
2008	1566340
2009	1577290