Year	Number
1960	24685
1961	26445
1962	28635
1963	30981
1964	33567
1965	37012
1966	40217
1967	44116
1968	47961
1969	51716
1970	56369
1971	60929
1972	65317
1973	70936
1974	77602
1975	84381
1976	91662
1977	99501
1978	107717
1979	120395
1980	131038
1981	141172
1982	148997
1983	156263
1984	163244
1985	171793
1986	181274
1987	190563
1988	199323
1989	208164
1990	216523
1991	226742
1992	236690
1993	248750
1994	263119
1995	279121
1996	302305
1997	312592
1998	323740
1999	335883
2000	347386
2001	358750
2002	369048
2003	376718
2004	387554
2005	396573
2006	405404
2007	413713
2008	421378
2009	429429
2010	441136
2011	453987
2012	471058
2013	487775
2014	509571
2015	535427
2016	559990
2017	584038
2018	609472
2019	637443
2020	661017
2021	683567
2022	706868
2023	756356