Year	Number
1960	25834
1961	26915
1962	28325
1963	29860
1964	31527
1965	33314
1966	35224
1967	37238
1968	39287
1969	41290
1970	42652
1971	43471
1972	44271
1973	45052
1974	46032
1975	47131
1976	48147
1977	49145
1978	50273
1979	51508
1980	52673
1981	53707
1982	54681
1983	55639
1984	56530
1985	57401
1986	58379
1987	59364
1988	60272
1989	61156
1990	62041
1991	63003
1992	63937
1993	64807
1994	65650
1995	66507
1996	67430
1997	68251
1998	69116
1999	69940
2000	70757
2001	71874
2002	73345
2003	74953
2004	76793
2005	79062
2006	81529
2007	84254
2008	87273
2009	90891
2010	95079
2011	99651
2012	104805
2013	110501
2014	116706
2015	123427
2016	130479
2017	137675
2018	145607
2019	153937
2020	162053
2021	169358
2022	176309
2023	183956