Year	Number of
1990	584.13
1991	614.33
1992	646.72
1993	680.42
1994	716.87
1995	756.64
1996	789.4
1997	824.95
1998	864.94
1999	908.65
2000	956.44
2001	1011.73
2002	1072.28
2003	1138.52
2004	1210.82
2005	1290.26
2006	1347.7
2007	1409.01
2008	1474.9
2009	1543.66
2010	1618.43
2011	1718.72
2012	1824.61
2013	1941.33
2014	2063.36
2015	2191.3
2016	2328.94