Year	Number
1960	26750
1961	27303
1962	27873
1963	28543
1964	29249
1965	29993
1966	30736
1967	31437
1968	32115
1969	32804
1970	33553
1971	34362
1972	35213
1973	36091
1974	37133
1975	38341
1976	39553
1977	40592
1978	41437
1979	42236
1980	43014
1981	43794
1982	44623
1983	45457
1984	46240
1985	46977
1986	47646
1987	48179
1988	48556
1989	48843
1990	49085
1991	49350
1992	49717
1993	50171
1994	50625
1995	51033
1996	51397
1997	51732
1998	52054
1999	52362
2000	52662
2001	52869
2002	53082
2003	53370
2004	53631
2005	53922
2006	54395
2007	54995
2008	55591
2009	56207
2010	56824
2011	57441
2012	58027
2013	58574
2014	59081
2015	59547
2016	60031
2017	60526
2018	61010
2019	61558
2020	62425
2021	63607
2022	64679
2023	65634