Year	Number
1960	23132
1961	23635
1962	24079
1963	24463
1964	24812
1965	25152
1966	25484
1967	25807
1968	26149
1969	26538
1970	26999
1971	27566
1972	28467
1973	29207
1974	30059
1975	31108
1976	32171
1977	33390
1978	34016
1979	34592
1980	35162
1981	35819
1982	36308
1983	36546
1984	36968
1985	37436
1986	37828
1987	39660
1988	40121
1989	40791
1990	41480
1991	42438
1992	42912
1993	44168
1994	45730
1995	46757
1996	47825
1997	48974
1998	50516
1999	51902
2000	52754
2001	53163
2002	55180
2003	54936
2004	55147
2005	55760
2006	57290
2007	57912
2008	59504
2009	60066
2010	62131
2011	60854
2012	61632
2013	62818
2014	63814
2015	65227
2016	66006
2017	66675
2018	67176
2019	67631
2020	68061
2021	68444
2022	82411
2023	82068