Year	Number of
1990	2864.32
1991	2913.58
1992	2963.01
1993	3027.18
1994	3103.7
1995	3179.48
1996	3201.78
1997	3221.82
1998	3241.89
1999	3263.73
2000	3285.23
2001	3354.74
2002	3428.65
2003	3509.28
2004	3598.47
2005	3692.95
2006	3745.79
2007	3797.65
2008	3852.63
2009	3912.83
2010	3973.85
2011	4008.8
2012	4045.43
2013	4083.14
2014	4121.9
2015	4161.69
2016	4203.75