Year	Number of
1990	2092.03
1991	2106.53
1992	2120.99
1993	2129.52
1994	2141.12
1995	2156.57
1996	2193.49
1997	2233.93
1998	2279.58
1999	2327.69
2000	2379.31
2001	2385.27
2002	2397.22
2003	2424.42
2004	2452.9
2005	2481.37
2006	2519.14
2007	2553.05
2008	2585.39
2009	2620.12
2010	2660.3
2011	2671.6
2012	2690.24
2013	2712.64
2014	2735.56
2015	2757.66
2016	2777.3