Year	Number of
1990	559.5
1991	590.22
1992	628.89
1993	667.09
1994	704.3
1995	745.14
1996	756.56
1997	782.89
1998	808.27
1999	850
2000	889.96
2001	913.83
2002	944.72
2003	978.55
2004	991.31
2005	1021.93
2006	1076.79
2007	1113.39
2008	1141.2
2009	1183.79
2010	1221.3
2011	1227.14
2012	1239.76
2013	1231.52
2014	1202.15
2015	1203.21
2016	1210.88