Year	Number of
1990	657.61
1991	663.48
1992	683.64
1993	707.74
1994	735.17
1995	762.18
1996	779.56
1997	784.18
1998	788.76
1999	795.71
2000	804.2
2001	806.46
2002	806.63
2003	798.83
2004	786.22
2005	768.41
2006	751.6
2007	739.14
2008	721.9
2009	708.66
2010	701.43
2011	688.23
2012	674.94
2013	661.77
2014	650.62
2015	641.21
2016	634.01