Year	Number
1960	160864
1961	177923
1962	189952
1963	198822
1964	203089
1965	202497
1966	197365
1967	188179
1968	175643
1969	157646
1970	135988
1971	115636
1972	97770
1973	82273
1974	70036
1975	60976
1976	54481
1977	50700
1978	48194
1979	49639
1980	53403
1981	54535
1982	55023
1983	54930
1984	53502
1985	50391
1986	44525
1987	37864
1988	30843
1989	21768
1990	11404
1991	4385
1992	740
1993	235
1994	4295
1995	11505
1996	23046
1997	37822
1998	56608
1999	77667
2000	102857
2001	122247
2002	137513
2003	148696
2004	154947
2005	155943
2006	151814
2007	142170
2008	128627
2009	108940
2010	86355
2011	65188
2012	49080
2013	36552
2014	26585
2015	18807
2016	14729
2017	13175
2018	14391
2019	17403
2020	18335
2021	20614
2022	66601
2023	67761