Year	Number
1997	690700
1998	706700
1999	735400
2000	804200
2001	816900
2002	805800
2003	821000
2004	851300
2005	886700
2006	886500
2007	898400
2008	888200
2009	841600
2010	861700
2011	868300
2012	899800
2013	916300
2014	912900
2015	912900
2016	917400
2017	911300
2018	900300
2019	900200
2020	870300