Year	Number of
1990	1450.42
1991	1524
1992	1524.79
1993	1584.15
1994	1685.33
1995	1713.01
1996	1651.45
1997	1636.89
1998	1651.22
1999	1660.43
2000	1735.95
2001	1761.02
2002	1791.6
2003	1824.49
2004	1895.35
2005	1973.31
2006	2054.38
2007	2085.72
2008	2062.78
2009	2087.44
2010	2140.32
2011	2200.87
2012	2261.62
2013	2330.45
2014	2370
2015	2398.72
2016	2441.99