Year	Number
1998	11729061
1999	11501705
2000	11155690
2001	11044573
2002	11314562
2003	10690293
2004	10021442
2005	9735915
2006	10353957
2007	9741989
2008	10602255
2009	10350278
2010	10700000
2011	10500000
2012	10500000
2013	10300000
2014	10200000
2015	10900000
2016	10500000
2017	10900000
2018	10600000