Year	Number
1999	1105297
2000	1017959
2001	1199544
2002	1146907
2003	1215533
2005	1147460
2006	1208785
2007	1043671
2008	884821
2009	944675
2011	667257
2012	716870
2013	541782
2014	453623
2015	395157
2016	544370
2017	622861