Year	Number
1990	456180
1991	462298
1992	470203
1993	478804
1994	485267
1995	491321
1996	496574
1997	499187
1998	501343
1999	506300
2000	508906
2001	508932
2002	508352
2003	507533
2004	506374
2005	508009
2006	509112
2007	511217
2008	514969
2009	518734
2010	522874
2011	527323
2012	530023
2013	532019
2014	534828
2015	537960
2016	540530
2017	542220
2018	543591
2019	543678
2020	542777
2021	542899
2022	540991