Year	Number
1960	115029
1961	114384
1962	113850
1963	113174
1964	111972
1965	110135
1966	107933
1967	105351
1968	102391
1969	98891
1970	94855
1971	90672
1972	86476
1973	82111
1974	77654
1975	73342
1976	69064
1977	64934
1978	61370
1979	58606
1980	56680
1981	54518
1982	51449
1983	48210
1984	45346
1985	42845
1986	40624
1987	38398
1988	36190
1989	34494
1990	32907
1991	31257
1992	29768
1993	28197
1994	26493
1995	24713
1996	23176
1997	21719
1998	19843
1999	17628
2000	15736
2001	14496
2002	13568
2003	12813
2004	12156
2005	11568
2006	10939
2007	10297
2008	9759
2009	9221
2010	8751
2011	8417
2012	8087
2013	7633
2014	7149
2015	6704
2016	6281
2017	5904
2018	5566
2019	5225
2020	4924
2021	4667
2022	4432