Year	Number of
1990	1168.99
1991	1209.87
1992	1247.54
1993	1288.67
1994	1336.11
1995	1387.35
1996	1423.42
1997	1457.64
1998	1488.67
1999	1524.92
2000	1566.07
2001	1612.19
2002	1659.13
2003	1706.76
2004	1759.45
2005	1817.07
2006	1858.56
2007	1899.26
2008	1944.22
2009	1995.78
2010	2050.09
2011	2087.27
2012	2126.87
2013	2167.67
2014	2209.67
2015	2252.86
2016	2298.66