Year	Number of
1990	4411.85
1991	4706.95
1992	4742.43
1993	4750.48
1994	4862.62
1995	5096.06
1996	5153.58
1997	5344.61
1998	5461.09
1999	5664.29
2000	5644.78
2001	5735.24
2002	5858.13
2003	6003.83
2004	6221.61
2005	6402.8
2006	6610.28
2007	6843.83
2008	6980.44
2009	7090.23
2010	7178.9
2011	7299.28
2012	7496.31
2013	7560.59
2014	7466.66
2015	7495.72
2016	7559.95