Year	Number
1970	25822752
1971	26126746
1972	26961422
1973	28095980
1974	29201164
1975	29906958
1976	30700906
1977	31431622
1978	31853088
1979	32149984
1980	32270846
1981	32206628
1982	32050748
1983	31804212
1984	31420454
1985	31141396
1986	31240446
1987	30973212
1988	30522490
1989	30158634
1990	29780242
1991	29766036
1992	29966450
1993	30709324
1994	31528298
1995	31433236
1996	30751728
1997	30407182
1998	29425482
1999	29283976
2000	29301202
2001	29430832
2002	29486260
2003	29421988
2004	29015206
2005	29248370
2006	29082296
2007	28724284
2008	28580678
2009	28316392
2010	28387308
2011	28276112
2012	28111538
2013	28226728
2014	28075302
2015	28063322
2016	28007210
2017	28085578
2018	28190566
2019	28178480
2020	28154752
2021	28301890
2022	28440502