Year	Number
1975	305733
1976	325663
1977	370200
1978	405175
1979	455351
1980	493524
1981	555887.1
1982	598144
1983	656954
1984	708579
1985	758433
1986	824061
1987	889384
1988	948517
1989	1004247.5
1990	1069268
1991	1144760
1992	1235613
1993	1332456
1994	1440244
1995	1540961
1996	1667313
1997	1795011
1998	1905149
1999	1995602
2000	2082890
2001	2123274
2002	2094325
2003	2147672
2004	2143215
2005	2324079
2006	2318822
2007	2415585
2008	2479935
2009	2488394
2010	2474407
2011	2503172
2012	2380972
2013	2253868
2014	2276228
2015	2235113
2016	2213718
2017	2242152
2018	2241216
2019	2254901
2020	2257799
2021	2195311
2022	2146201