Year	Number
1960	8427
1961	8427
1962	8427
1963	8427
1964	8427
1966	8427
1967	8427
1968	8427
1969	8427
1971	8427
1972	8427
1973	8427
1974	8427
1981	89300
1982	99750
1983	111400
1984	124350
1985	138900
1986	155000
1987	173100
1988	199300
1989	215850
1990	220000
1991	232980
1992	235803
1993	240000
1994	264000
1995	318000
1996	380000
1997	400000
1998	500000
1999	550000
2000	605000
2001	660000
2002	720000
2003	750000
2004	799500
2005	852300
2006	909000
2007	969000
2008	920416
2009	1063265
2010	1228300
2011	1000000
2012	814000
2013	789000
2014	914491
2015	1063265
2016	1374408
2017	1576000
2019	1576000
2020	1576000
2021	1576000
2022	1218180