Year	Number of
1990	495.04
1991	504.4
1992	522.27
1993	538.45
1994	554.19
1995	566.17
1996	581.35
1997	598.23
1998	599.58
1999	601.16
2000	607.88
2001	594.5
2002	604.83
2003	610.21
2004	624.69
2005	647.27
2006	657.44
2007	680.4
2008	695.75
2009	718.35
2010	745.64
2011	766.27
2012	787.29
2013	819.28
2014	870.56
2015	932.63
2016	978.89