Year	Number of
1990	1582.31
1991	1679.4
1992	1784.92
1993	1898.17
1994	2022.03
1995	2159.2
1996	2196.21
1997	2233.67
1998	2274.13
1999	2323.33
2000	2383.32
2001	2390.57
2002	2392
2003	2388.76
2004	2395.45
2005	2411.71
2006	2457.9
2007	2500.66
2008	2542.05
2009	2588.26
2010	2643.11
2011	2716.98
2012	2788.58
2013	2856.53
2014	2944.25
2015	3037.07
2016	3136.9