Year	Number
1993	416982
1994	412575
1995	409594
1996	407903
1997	403718
1998	422805
1999	433799
2000	465041
2001	457945
2002	456029
2003	451729
2004	446703
2005	435802
2006	420545
2007	402164
2008	385248
2009	368958
2010	354810
2011	345264
2012	335487
2013	326248
2014	315975
2015	309466
2016	305920
2017	304392