Year	Number of
1990	336.37
1991	350.29
1992	370.24
1993	393.3
1994	412.43
1995	426.95
1996	450.11
1997	470.3
1998	495.55
1999	530.4
2000	552.08
2001	575.09
2002	597.39
2003	617.97
2004	632.28
2005	643.92
2006	654.44
2007	678.9
2008	707.33
2009	745.3
2010	781.54
2011	810.43
2012	832.71
2013	847.9
2014	859.69
2015	886.13
2016	916.08