Year	Number
1965	72700
1966	72700
1967	72700
1968	72700
1969	72700
1970	95800
1971	95800
1972	95800
1973	95800
1974	95800
1975	128900
1976	140723
1977	172400
1978	207000
1979	260400
1980	311400
1981	362900
1982	408211
1983	445779
1984	465309
1985	537056
1986	578571
1987	634859
1988	697209
1989	749851
1990	812000
1991	883120
1992	962247
1993	1068094
1994	1122409
1995	1176316
1996	1278142
1997	1400343
1998	1477000
1999	1600000
2000	1761327
2001	1880000
2002	1950000
2003	2079464
2004	2486720
2005	2572000
2006	2841297
2007	3068409
2008	3069140
2009	2576165
2010	2922731
2011	3059336
2012	3289363
2013	3132829
2014	3098787
2015	3267592
2016	3404709
2017	4100982
2018	4200919
2019	4635661
2020	4785763
2021	5097059
2022	5576193