Year	Number
1960	34369
1961	35413
1962	37013
1963	38906
1964	40821
1965	42713
1966	44613
1967	46540
1968	48569
1969	50772
1970	53203
1971	55871
1972	58724
1973	60574
1974	61021
1975	61490
1976	62429
1977	63443
1978	64365
1979	65222
1980	66029
1981	66806
1982	67555
1983	68310
1984	69098
1985	69925
1986	70840
1987	71885
1988	73115
1989	74544
1990	76155
1991	77907
1992	79673
1993	81056
1994	82201
1995	83564
1996	85189
1997	87114
1998	89302
1999	91700
2000	94247
2001	96839
2002	99110
2003	101293
2004	103878
2005	106848
2006	110205
2007	113983
2008	118156
2009	122661
2010	127497
2011	132149
2012	136521
2013	141094
2014	145894
2015	150809
2016	155698
2017	160562
2018	165402
2019	170235
2020	175167
2021	180164
2022	185584
2023	191552