Year	Number of
1990	392.39
1991	408.69
1992	437.04
1993	468.19
1994	492.42
1995	508.2
1996	524.47
1997	541.58
1998	555.89
1999	579.12
2000	598.85
2001	629.5
2002	662.61
2003	698.24
2004	723.68
2005	743.57
2006	750.59
2007	764.69
2008	802.61
2009	853.26
2010	894.72
2011	923.07
2012	943.17
2013	942.45
2014	946.74
2015	988.43
2016	1031.88