Year	Number
1971	298880
1972	313424
1973	335190
1974	361725
1975	403673
1976	486173
1977	529027
1978	589610
1979	662034
1980	726595
1981	797110
1982	888123
1983	968327
1984	1046136
1985	1130185
1986	1248702
1987	1331971
1988	1415530
1989	1418812
1990	1450112
1991	1194377
1992	1235527
1993	1274982
1994	1338508
1995	1375703
1996	1412316
1997	1442049
1998	1443407
1999	1469794
2000	1541100
2001	1608279
2002	1685063
2003	1758057
2004	1879483
2005	1948006
2006	2061046
2007	2171687
2008	2241514
2009	2330649
2010	2393275
2011	2478987
2012	2554050
2017	2847122
2018	2871043
2019	2920791
2020	2983288
2021	3047518
2022	3244544