Year	Number of
1990	5790.93
1991	5966.07
1992	6184.43
1993	6413.8
1994	6671.07
1995	6937.54
1996	7227.53
1997	7579.31
1998	7991.1
1999	8273.85
2000	8459.74
2001	8484.12
2002	8461.93
2003	8406.32
2004	8256.46
2005	8200.31
2006	8200.93
2007	8125.68
2008	8029.41
2009	7987.34
2010	7997.34
2011	7972.69
2012	7992.92
2013	8030.48
2014	8079.22
2015	8117.49
2016	8125.48