Year	Number
1971	165854
1973	174711
1978	257798
1980	268733
1981	287310
1982	289073
1985	267970
1992	285500
1994	301274
1995	323422
1996	336970
1997	347850
1998	388667
1999	389181
2000	400699
2001	335237
2002	349930
2003	364541
2004	374052
2005	377890
2006	381466
2007	384162
2008	384726
2009	391087
2010	383226
2011	394453
2012	384851
2013	389354
2014	370359
2015	382427
2016	384075
2017	401031
2018	402502
2019	406169
2020	410724
2021	424028
2022	410207