Year	Number
1992	173715
1994	175796
1995	177261
1996	177253
1997	177460
1999	163033
2000	147986
2001	140559
2002	123619
2003	109455
2004	101389
2005	97708
2006	101345
2007	117275
2008	128835
2009	142349
2010	153989
2011	151867
2012	150339
2013	170917
2014	176710
2015	188736