Year	Number of
1990	1191.29
1991	1202.47
1992	1218.01
1993	1232.51
1994	1250.13
1995	1263.68
1996	1324.84
1997	1391.83
1998	1451.26
1999	1530.06
2000	1620.27
2001	1573.75
2002	1555.52
2003	1559.65
2004	1574.76
2005	1586.53
2006	1613.47
2007	1639.6
2008	1664.43
2009	1691.26
2010	1718.53
2011	1769.93
2012	1831.97
2013	1903.41
2014	1988.85
2015	2080.95
2016	2173.64