Year	Number of
1990	2061.97
1991	2122.37
1992	2158.15
1993	2201.34
1994	2213.7
1995	2260.82
1996	2301.72
1997	2344.31
1998	2397.87
1999	2441.8
2000	2462.52
2001	2475.67
2002	2490.04
2003	2521.26
2004	2530.66
2005	2526.15
2006	2509.32
2007	2500.55
2008	2499.68
2009	2500.54
2010	2492.75
2011	2519.13
2012	2541.77
2013	2557.18
2014	2588.26
2015	2650.05
2016	2730.88