Year	Number of
1990	572.22
1991	608.77
1992	649.12
1993	691.44
1994	739.24
1995	788.41
1996	815.08
1997	845.39
1998	868.29
1999	885.78
2000	913.75
2001	904.19
2002	888.3
2003	872.35
2004	861.44
2005	840.15
2006	822.05
2007	800.22
2008	842.42
2009	879.92
2010	917.13
2011	945.84
2012	981.68
2013	1004.45
2014	1028.23
2015	1054.19
2016	1095.83