Year	Number of
1990	601.48
1991	622.71
1992	639.69
1993	651.72
1994	679.19
1995	712.84
1996	790.27
1997	734.24
1998	761.24
1999	752.28
2000	769.88
2001	814.96
2002	821.59
2003	858.6
2004	859.48
2005	862.4
2006	888.75
2007	921.94
2008	949.02
2009	964.71
2010	973.99
2011	990.24
2012	1013.96
2013	1017.13
2014	1026.61
2015	1039.02
2016	1052.08