Year	Number of
1990	807.81
1991	823.73
1992	841.06
1993	859.23
1994	881.77
1995	908.49
1996	938.71
1997	972.48
1998	1006.18
1999	1039.67
2000	1074.03
2001	1118.91
2002	1168.07
2003	1220.84
2004	1278.95
2005	1342.08
2006	1399.37
2007	1462.31
2008	1531.87
2009	1609.01
2010	1692.9
2011	1753.07
2012	1820.95
2013	1892.87
2014	1970.95
2015	2047.69
2016	2127.51