Year	Number
1960	93351
1961	92511
1962	91486
1963	90260
1964	88922
1965	87195
1966	85051
1967	82616
1968	79832
1969	76734
1970	73494
1971	70283
1972	67068
1973	63980
1974	61104
1975	58427
1976	55917
1977	53521
1978	51231
1979	49053
1980	46852
1981	44669
1982	42589
1983	40563
1984	38662
1985	41264
1986	35520
1987	34268
1988	33184
1989	32252
1990	31427
1991	30610
1992	29753
1993	28819
1994	27822
1995	26781
1996	25722
1997	24653
1998	23643
1999	22706
2000	21827
2001	20978
2002	20143
2003	19318
2004	18500
2005	17687
2006	16879
2007	16101
2008	15363
2009	14661
2010	14020
2011	13442
2012	12910
2013	12410
2014	11945
2015	11502
2016	11059
2017	10656
2018	10283
2019	9995
2020	9704
2021	9358
2022	8982