Year	Number of
1990	648.84
1991	680.33
1992	713.43
1993	752.65
1994	794.78
1995	840.32
1996	893.09
1997	949.18
1998	1010.83
1999	1076
2000	1145.46
2001	1202.3
2002	1262.15
2003	1324.83
2004	1390.52
2005	1460.15
2006	1531.97
2007	1607.09
2008	1687.08
2009	1772.7
2010	1865.69
2011	1946.2
2012	2033.9
2013	2130.36
2014	2233.29
2015	2342.77
2016	2463.95