Year	Number
1960	48930
1961	49696
1962	50898
1963	52504
1964	54157
1965	55841
1966	57559
1967	59284
1968	60946
1969	62464
1970	63127
1971	63178
1972	63495
1973	64014
1974	64695
1975	65545
1976	66574
1977	67778
1978	69159
1979	70683
1980	71990
1981	72952
1982	74375
1983	76500
1984	78857
1985	81368
1986	84092
1987	87057
1988	90524
1989	94446
1990	98523
1991	102779
1992	107238
1993	112667
1994	119149
1995	126047
1996	133419
1997	141204
1998	149274
1999	157570
2000	166096
2001	174752
2002	183430
2003	192147
2004	200904
2005	209753
2006	218770
2007	225553
2008	230091
2009	234742
2010	239537
2011	244341
2012	248982
2013	253647
2014	258723
2015	264773
2016	272247
2017	280879
2018	289685
2019	297007
2020	302498
2021	307359
2022	312916
2023	320910