Year	Number
1960	1493
1961	1507
1962	1528
1963	1552
1964	1578
1965	1610
1966	1641
1967	1666
1968	1789
1969	2062
1970	2422
1971	2834
1972	3304
1973	3857
1974	4526
1975	5380
1976	6055
1977	6408
1978	6667
1979	6798
1980	6842
1981	7057
1982	7461
1983	7834
1984	8155
1985	8440
1986	8748
1987	9109
1988	9509
1989	9952
1990	10446
1991	11000
1992	11612
1993	12255
1994	12876
1995	13402
1996	13904
1997	14476
1998	15120
1999	15876
2000	16748
2001	17676
2002	18542
2003	19219
2004	19588
2005	19595
2006	18162
2007	14443
2008	9831
2009	6639
2010	6819
2011	9370
2012	12552
2013	16495
2014	21357
2015	27311
2016	34582
2017	43512
2018	54603
2019	68526
2020	79797
2021	87638
2022	92861
2023	95280