Year	Number
1971	443031
1972	451643
1973	467405
1974	482465
1975	487329
1976	490891
1977	472134
1978	461838
1979	448370
1980	442931
1981	434635
1982	432127
1983	431946
1984	426766
1985	415148
1986	402707
1987	391895
1988	380049
1989	363031
1990	350201
1991	340267
1992	327024
1993	323651
1994	326619
1995	328875
1996	336690
1998	360683
1999	371694
2000	384197
2001	395870
2002	415205
2004	419806
2005	414103
2006	415793
2007	415793
2008	410400
2009	406622
2010	403344
2011	470807
2012	470711
2013	469568
2014	467484
2015	468536
2016	471787
2017	472523
2018	468362
2019	461874
2020	452253
2021	443943
2022	435507