Year	Number of
1990	1144.42
1991	1177.6
1992	1212.08
1993	1248.27
1994	1286.4
1995	1327.18
1996	1369.2
1997	1413.49
1998	1460.26
1999	1509.83
2000	1562.86
2001	1594.9
2002	1628.53
2003	1663.89
2004	1701.54
2005	1742.37
2006	1778.4
2007	1815.97
2008	1856.56
2009	1899.27
2010	1945
2011	2013.98
2012	2086.07
2013	2159.69
2014	2237.39
2015	2320
2016	2410.17