Year	Number
1960	23195
1961	23811
1962	24453
1963	25115
1964	25796
1965	26494
1966	26996
1967	27276
1968	27537
1969	27926
1970	28445
1971	28956
1972	29451
1973	29903
1974	30084
1975	29992
1976	29858
1977	29696
1978	29523
1979	29694
1980	30203
1981	30718
1982	31250
1983	31805
1984	32398
1985	33080
1986	33845
1987	34654
1988	35490
1989	36332
1990	37111
1991	37815
1992	38462
1993	39056
1994	39639
1995	40245
1996	40891
1997	41572
1998	42267
1999	42953
2000	43680
2001	44473
2002	45346
2003	46275
2004	47209
2005	48127
2006	49037
2007	49967
2008	50920
2009	51896
2010	52840
2011	53709
2012	54514
2013	55285
2014	56042
2015	56833
2016	57677
2017	58544
2018	59441
2019	60390
2020	61495
2021	62724
2022	63943
2023	65144