Year	Number of
1990	7337.55
1991	7514.16
1992	7692.44
1993	7871.36
1994	7941.62
1995	8159.71
1996	8270.74
1997	8397.33
1998	8416.39
1999	8389.17
2000	8445.5
2001	8383.49
2002	8621.34
2003	8473.99
2004	8442.18
2005	8349.61
2006	8262.35
2007	8212.66
2008	8020.56
2009	7935.76
2010	7861.2
2011	7738.23
2012	7781.65
2013	7878.63
2014	8031.46
2015	8308.86
2016	8587.01