Year	Number
1971	695023
1972	772704
1973	868885
1974	982295
1975	1066486
1976	1193741
1977	1324539
1978	1386136
1979	1737923
1980	1805708
1981	1919967
1982	1990866
1984	2191713
1985	2249780
1986	2243373
1987	2184850
1988	2108964
1989	2083237
1990	2117903
1991	2230403
1992	2444092
1993	2717672
1994	3044069
1995	3382755
1996	3794290
1997	3925923
1998	4097331
2001	4072108
2002	4150184
2004	4253380
2005	4533173
2006	4530029
2007	4789339
2008	4728761
2009	4769211
2010	4807093
2011	4892517
2012	4785810
2013	4655351
2014	6791615
2015	6757174
2016	6570988
2017	5687981
2018	5603067
2019	5487117
2020	5358753
2021	4976925
2022	5034756
2023	5352005