Year	Number of
1990	2701.72
1991	2786.11
1992	2937.53
1993	3094.32
1994	3213.34
1995	3387.96
1996	3483.84
1997	3627.7
1998	3766.12
1999	3863.78
2000	3885.28
2001	4005.9
2002	4202.72
2003	4384.27
2004	4500.91
2005	4720.05
2006	4838.75
2007	4960.9
2008	5241.88
2009	5556.92
2010	5605.27
2011	5688.46
2012	5937.94
2013	6272.14
2014	6546.43
2015	6632.61
2016	6782.3