Year	Number
1960	48629
1961	44492
1962	12282
1963	10946
1964	10178
1965	9980
1966	10225
1967	9991
1968	17950
1969	19275
1970	18518
1971	17196
1972	20933
1973	13358
1974	11410
1975	16349
1976	27387
1977	29537
1978	31295
1979	57913
1980	92679
1981	96415
1982	107591
1983	120947
1984	112966
1985	92194
1986	98743
1987	104843
1988	116434
1989	135752
1990	154761
1991	170916
1992	183723
1993	183241
1994	186555
1995	152110
1996	138427
1997	125176
1998	119355
1999	123303
2000	126991
2001	129227
2002	129935
2003	133088
2004	141402
2005	147164
2006	151832
2007	175728
2008	173642
2009	169424
2010	165544
2011	164879
2012	163751
2013	160347
2014	149164
2015	135890
2016	97322
2017	104768
2018	114101
2019	101757
2020	109214
2021	130125
2022	140621
2023	169448