Year	Number of
1990	757.98
1991	774.63
1992	795.28
1993	818.31
1994	842.48
1995	868.16
1996	885.36
1997	903.58
1998	922.6
1999	942.64
2000	965.34
2001	983.73
2002	1005.54
2003	1030.11
2004	1056.4
2005	1085.21
2006	1109.04
2007	1133.5
2008	1161.52
2009	1190.75
2010	1222.14
2011	1255.14
2012	1290.71
2013	1327.6
2014	1367.02
2015	1409.18
2016	1451.53