Year	Number
1971	327639
1972	367298
1973	406102
1974	437997
1975	458327
1976	488409
1977	512187
1978	545468
1979	579739
1980	588865
1981	604327
1982	635355
1983	687435
1984	755095
1985	815071
1986	870383
1987	912117
1988	925381
1989	933661
1990	923532
1991	914250
1992	902819
1993	916950
1994	923030
1995	928882
1996	935048
1997	957664
1998	1000549
1999	1029769
2000	1069040
2001	1124752
2002	1182424
2003	2119690
2004	2249116
2005	2389383
2006	2464688
2007	2549444
2008	2626228
2009	2664335
2010	2731825
2011	2820911
2012	2875612
2013	1857140
2020	1234977
2021	1287257
2022	1321091
2023	1353625