Year	Number of
1990	479.57
1991	505.15
1992	528.96
1993	549.03
1994	563.72
1995	581.17
1996	609.26
1997	632.89
1998	672.5
1999	692.21
2000	725.89
2001	744.82
2002	766.67
2003	801.14
2004	838.98
2005	865.8
2006	899.74
2007	929.59
2008	956.84
2009	990.21
2010	1016.26
2011	1031.74
2012	1051.23
2013	1070.11
2014	1097.43
2015	1141.52
2016	1190.09