Year	Number of
1990	415.84
1991	439.77
1992	467.26
1993	478.01
1994	503.9
1995	540.04
1996	569.74
1997	601.79
1998	610.31
1999	625.56
2000	644.86
2001	677.13
2002	699.61
2003	716.56
2004	732.92
2005	758.79
2006	781.84
2007	816.45
2008	845.19
2009	879.91
2010	918.12
2011	945.23
2012	972.23
2013	1002.65
2014	1031.75
2015	1064.6
2016	1091