Year	Number
1960	1626724
1961	1627354
1962	1626595
1963	1625837
1964	1625077
1965	1624321
1966	1623563
1967	1622806
1968	1622048
1969	1621293
1970	1620537
1971	1618638
1972	1609553
1973	1600544
1974	1591573
1975	1582652
1976	1573769
1977	1564960
1978	1556188
1979	1547466
1980	1538780
1981	1531462
1982	1532310
1983	1533157
1984	1534007
1985	1534855
1986	1535704
1987	1536554
1988	1537405
1989	1538255
1990	1539106
1991	1539980
1992	1541006
1993	1542030
1994	1543055
1995	1544082
1996	1545111
1997	1546137
1998	1547166
1999	1548195
2000	1549227
2001	1552880
2002	1574455
2003	1596329
2004	1618539
2005	1640995
2006	1656806
2007	1670919
2008	1690624
2009	1710506
2010	1730649
2011	1751030
2012	1771680
2013	1792515
2014	1813624
2015	1834982
2016	1856622
2017	1878456
2018	1900547
2019	1915338
2020	1929944
2021	1944910
2022	1960023
2023	1975271