Year	Number of
1990	787.35
1991	810.99
1992	834.79
1993	858.82
1994	885
1995	913.73
1996	943.23
1997	973.57
1998	1003.7
1999	1035.51
2000	1069.69
2001	1105.93
2002	1142.89
2003	1180.14
2004	1219.91
2005	1262.6
2006	1301.96
2007	1340.64
2008	1379.23
2009	1418.95
2010	1459.84
2011	1488.97
2012	1518.05
2013	1545.4
2014	1573.59
2015	1600.44
2016	1630.24