Year	Number
1970	25054120
1971	24891206
1972	24469856
1973	24575420
1974	23805760
1975	23154056
1976	22659824
1977	22192932
1978	21856392
1979	21414316
1980	22892852
1981	22610852
1982	22911876
1983	22443534
1984	22097064
1985	22118568
1986	22474206
1987	22869952
1988	23472798
1989	24076094
1990	24629534
1991	24810360
1992	25105668
1993	25381310
1994	25619004
1995	26242750
1996	26500498
1997	26837758
1998	27100828
1999	27372002
2000	27618786
2001	27822244
2002	27756158
2003	27433346
2004	27085434
2005	26759270
2006	26479168
2007	26324224
2008	26339448
2009	26412064
2010	26572532
2011	26754534
2012	26714646
2013	26627910
2014	26791636
2015	27093808
2016	27342090
2017	27492424
2018	27369106
2019	27198358
2020	26897902
2021	26304576
2022	26774364