Year	Number of
1990	358.37
1991	369.37
1992	381.71
1993	394.92
1994	408.5
1995	422.54
1996	433.21
1997	444.25
1998	455.77
1999	467.72
2000	480.61
2001	489.46
2002	499.1
2003	509.45
2004	521.16
2005	535.03
2006	551.91
2007	570.21
2008	591.11
2009	612.46
2010	634.44
2011	655.43
2012	677.42
2013	700.42
2014	724.74
2015	750.62
2016	777.02