Year	Number
1970	609174
1971	620865
1972	646341
1973	679557
1974	710943
1975	760956
1976	795508
1977	790081
1978	816377
1979	847777
1980	856933
1981	889615
1983	950896
1984	1023633
1986	1043770
1987	1129846
1989	1057479
1990	1097661
1991	1133818
1992	1156679
1993	1189774
1994	1236316
1995	1287601
1996	1326463
1997	1365325
1998	1400205
1999	1444879
2000	1461816
2001	1469558
2002	1497204
2003	1494321
2004	1504493
2005	1512676
2006	1508194
2007	1512002
2008	1508389
2009	1469495
2010	1444023
2011	1400598
2012	1373868
2013	1360090
2014	1345789
2015	1345182
2016	1354038
2017	1368580
2018	1379099
2019	1386548
2020	1392750
2021	1394450
2022	1404321