Year	Number
1960	25686
1961	25185
1962	24147
1963	23195
1964	22341
1965	21586
1966	20943
1967	20424
1968	20015
1969	19683
1970	19719
1971	20125
1972	20549
1973	20960
1974	21397
1975	21886
1976	22441
1977	23055
1978	23713
1979	24362
1980	24928
1981	25383
1982	25746
1983	26102
1984	26541
1985	26957
1986	27356
1987	27887
1988	28504
1989	29120
1990	29711
1991	30289
1992	30888
1993	31545
1994	32251
1995	32989
1996	33761
1997	34569
1998	35430
1999	36339
2000	37274
2001	38226
2002	39349
2003	40621
2004	41874
2005	43122
2006	44362
2007	45584
2008	46800
2009	48021
2010	49252
2011	50497
2012	51606
2013	52584
2014	53580
2015	54609
2016	55689
2017	56811
2018	57975
2019	59214
2020	60829
2021	62678
2022	64458
2023	66247