Year	Number of
1990	722.77
1991	736.22
1992	750.04
1993	764.15
1994	779.22
1995	796.09
1996	810.05
1997	825.75
1998	842.49
1999	860.19
2000	879.5
2001	899.8
2002	922.12
2003	945.84
2004	970.94
2005	998.2
2006	1028.89
2007	1060.4
2008	1095.19
2009	1131.85
2010	1171.35
2011	1208.23
2012	1247.82
2013	1290.08
2014	1334.16
2015	1379.94
2016	1427.69