Year	Number of
1990	480.33
1991	489.23
1992	492.65
1993	511.75
1994	522.21
1995	534.46
1996	540.52
1997	553.87
1998	563.93
1999	558.43
2000	567.4
2001	581.82
2002	601.31
2003	620.56
2004	640.92
2005	661.9
2006	677.6
2007	692.58
2008	709.07
2009	726.74
2010	748
2011	759.56
2012	775.26
2013	797.87
2014	819.22
2015	843.25
2016	866.65