Year	Number of
1990	512.58
1991	536.24
1992	559.55
1993	576.59
1994	592.06
1995	605.75
1996	629.58
1997	652.33
1998	670.77
1999	695.87
2000	727.12
2001	758.88
2002	787.04
2003	813.11
2004	835.19
2005	861.38
2006	880.85
2007	897.1
2008	908.87
2009	924.69
2010	941.3
2011	959.75
2012	983.29
2013	1008.02
2014	1025.21
2015	1039.66
2016	1055.2