Year	Number
1981	389000
1982	376800
1983	385000
1984	420000
1985	500000
1986	600000
1987	582000
1988	700000
1989	740000
1990	755000
1991	870000
1992	913500
1993	955000
1994	1000000
1995	1050000
1996	1098000
1997	1250000
1998	1245200
1999	1371300
2000	1426114
2001	1369069
2002	1286925
2003	1428487
2004	714000
2005	778260
2006	754912
2007	800207
2008	813010
2009	747969
2010	1554309
2011	1424420.15538991
2012	1310276.41341743
2013	1218000
2014	1216152
2015	1039810
2016	1042929
2017	590517
2018	580174.156834825
2019	526333.995080553
2020	356
2021	40633