Year	Number
1972	65634
1973	71134
1974	70050
1975	80752
1976	85974
1977	97119
1978	106026
1979	111447
1980	130975
1981	138498
1982	149532
1983	153679
1984	163391
1985	168137
1986	174752
1987	187746
1988	194387
1989	199043
1990	212075
1991	222225
1992	257558
1993	245096
1994	218707
1995	322999
1996	343314
1998	472734
1999	556322
2000	486786
2001	518251
2002	517690
2004	505303
2005	516462
2006	565467
2007	574003
2008	636416
2009	666679
2010	692157
2011	736364
2012	761366
2013	853210
2014	920209
2015	961589
2016	951555
2017	998940
2018	1040975
2019	989847
2021	1075245
2022	1097000