Year	Number of
1990	967.42
1991	1008.17
1992	1053.9
1993	1103.45
1994	1147.02
1995	1192.05
1996	1239.11
1997	1290.71
1998	1333.09
1999	1376.45
2000	1436.84
2001	1489.72
2002	1567.08
2003	1652.82
2004	1738.06
2005	1833.32
2006	1935.75
2007	2031.3
2008	2135.01
2009	2243.72
2010	2356.31
2011	2474.13
2012	2596.51
2013	2714.93
2014	2806.19
2015	2864.54
2016	2873.88