Year	Number of
1990	520.14
1991	537.11
1992	555.37
1993	574.88
1994	595.67
1995	617.96
1996	648.76
1997	682.09
1998	718.04
1999	756.73
2000	798.5
2001	823.55
2002	850.1
2003	878.27
2004	908.34
2005	940.86
2006	959.48
2007	979.78
2008	1002.34
2009	1026.56
2010	1052.52
2011	1085.58
2012	1121.27
2013	1159.3
2014	1200.02
2015	1243.53
2016	1288.28