Year	Number
1974	234278
1975	235540
1976	236425
1977	237241
1978	238200
1979	241085
1980	245389
1981	248953
1982	252114
1983	255991
1984	260538
1985	266009
1986	271774
1987	277310
1988	282492
1989	287187
1990	291425
1991	296584
1992	302220
1993	306894
1994	313110
1995	326224
1996	337110
1997	337751
1998	335054
1999	334185
2000	333928
2001	332168
2002	330479
2003	329093
2004	326929
2005	324577
2006	323474
2007	322521
2008	321211
2009	320575
2010	320103
2011	319930
2012	319788
2013	317766
2014	315930
2015	315065
2016	313750
2017	313252
2018	311840
2019	310049
2020	306761
2021	304496
2022	302078