Year	Number of
1990	565.43
1991	580.67
1992	598.54
1993	617.26
1994	639.92
1995	662.4
1996	681.86
1997	702.54
1998	729.46
1999	762.57
2000	803.3
2001	846.31
2002	901.89
2003	968.7
2004	991.07
2005	1040.4
2006	1066.86
2007	1105.28
2008	1148.88
2009	1200.24
2010	1268.4
2011	1343.05
2012	1415.99
2013	1488.73
2014	1560.89
2015	1634.45
2016	1707.15