Year	Number
1960	537035
1961	537035
1962	537035
1963	537035
1964	537035
1965	715000
1966	715000
1967	715000
1968	715000
1969	715000
1970	841000
1971	841000
1972	841000
1973	841000
1974	841000
1975	987000
1976	1054996
1977	1070702
1978	1092148
1979	1102740
1980	1136453
1981	1173276
1982	1197726
1983	1225569
1984	1259761
1985	1295022
1986	1327766
1987	1370000
1988	1406000
1989	1444000
1990	1469000
1991	1493000
1992	1534000
1993	1593000
1994	1658000
1995	1719000
1996	1726600
1997	1776400
1998	1809000
1999	1833400
2000	1831000
2001	1823000
2002	1765000
2003	1798000
2004	1800500
2005	1729000
2006	1761645
2007	1746874
2008	1750000
2009	1870000
2010	1880000
2011	1880000
2012	1880000
2013	1850000
2014	1850000
2015	1850000
2016	1760000
2017	1790000
2018	1073000
2019	967000
2020	844000
2021	908000
2022	757000