Year	Number of
1990	718.12
1991	745.44
1992	773.03
1993	798.25
1994	824.62
1995	851.49
1996	883.13
1997	916.02
1998	949.48
1999	1003.81
2000	1066.99
2001	1105.42
2002	1150.26
2003	1202.27
2004	1262.72
2005	1323.09
2006	1378.73
2007	1433.21
2008	1494.97
2009	1559.74
2010	1621.15
2011	1636.47
2012	1646.05
2013	1652.96
2014	1652.53
2015	1647.25
2016	1629.61