Year	Number of
1990	2595.95
1991	2711.6
1992	2833.9
1993	2949.83
1994	3070.57
1995	3204.87
1996	3340.26
1997	3482.5
1998	3654.65
1999	3896.48
2000	4110.98
2001	4291.02
2002	4455.24
2003	4626.73
2004	4783.3
2005	4968.94
2006	5191.24
2007	5396.45
2008	5604.07
2009	5784.09
2010	5956.24
2011	6215.24
2012	6471.67
2013	6673.66
2014	6858.33
2015	7032.57
2016	7335.6