Year	Number of
1990	1047.06
1991	1101.25
1992	1142.34
1993	1148.64
1994	1225.38
1995	1261.13
1996	1322.84
1997	1323.3
1998	1326.3
1999	1369.47
2000	1329.99
2001	1372.4
2002	1479.77
2003	1498.3
2004	1450.51
2005	1476.96
2006	1500.41
2007	1500.25
2008	1543.6
2009	1567.57
2010	1587.98
2011	1624.31
2012	1638.49
2013	1680.17
2014	1710.06
2015	1751.28
2016	1790.94