Year	Number of
1990	1326.15
1991	1340.58
1992	1350.14
1993	1387.43
1994	1401.92
1995	1452.02
1996	1484.16
1997	1500.95
1998	1530.15
1999	1570.53
2000	1588.95
2001	1622.01
2002	1645.07
2003	1683.83
2004	1676.5
2005	1716.33
2006	1715.24
2007	1736.41
2008	1757.41
2009	1762.2
2010	1765.5
2011	1783.9
2012	1795.53
2013	1794.61
2014	1796.25
2015	1808.05
2016	1822.69