Year	Number of
1990	1793.2
1991	1870.13
1992	1954.22
1993	2022.32
1994	2106.3
1995	2199.57
1996	2298.09
1997	2399.11
1998	2444.27
1999	2498.64
2000	2555.98
2001	2605.48
2002	2690.04
2003	2788.58
2004	2878.53
2005	2962.4
2006	3085.32
2007	3185.5
2008	3290.24
2009	3401.49
2010	3522.62
2011	3595.44
2012	3663.47
2013	3731.83
2014	3800.04
2015	3825.91
2016	3824.95