Year	Number
1971	809800
1972	844640
1973	871880
1974	892797
1975	889777
1976	879169
1977	858677
1978	833331
1979	808000
1980	783900
1981	756500
1982	733900
1983	720800
1984	713700
1985	713100
1986	716200
1987	720300
1988	720700
1989	720400
1990	711700
1991	968200
1992	968200
1993	970300
1994	993900
1995	1024600
1996	1055200
1997	1064700
1998	973500
2008	880231
2009	822899
2010	762616
2011	722508
2012	693047
2013	660837
2014	648541
2015	644153
2016	644344
2017	644334
2018	649357
2019	659299
2020	679577
2021	698534
2022	710858