Year	Number
1985	270700
1986	272700
1987	282500
1988	294800
1989	309000
1990	309800
1991	287200
1992	307900
1993	294100
1994	305800
1995	345000
1996	380800
1997	426100
1998	458500
1999	477200
2000	502700
2001	560400
2002	555000
2003	559100
2004	601600
2005	664400
2006	716500
2007	749700
2008	767800
2009	709500
2010	760500
2011	793000
2012	836800
2013	855400
2014	880700
2015	913700
2016	909900
2017	917600
2018	946300
2019	993600
2020	970400
2021	1015900