Year	Number
1960	32998
1961	33477
1962	34054
1963	34705
1964	35416
1965	36181
1966	37017
1967	37894
1968	38767
1969	39641
1970	40510
1971	41381
1972	42276
1973	43231
1974	44253
1975	45381
1976	46652
1977	48022
1978	49493
1979	51082
1980	52781
1981	54621
1982	56583
1983	58604
1984	60652
1985	62703
1986	64715
1987	66654
1988	68530
1989	70352
1990	72122
1991	73857
1992	75566
1993	77258
1994	78978
1995	80699
1996	82349
1997	83980
1998	85590
1999	87079
2000	88349
2001	89314
2002	89925
2003	90177
2004	90033
2005	89491
2006	88627
2007	87710
2008	86799
2009	85938
2010	85352
2011	85079
2012	85217
2013	85949
2014	87405
2015	88531
2016	89157
2017	90146
2018	91484
2019	93193
2020	94919
2021	95999
2022	96739
2023	98331