Year	Number of
1990	542.33
1991	559.7
1992	575.67
1993	588.72
1994	609.95
1995	625.42
1996	637.99
1997	651.18
1998	668.68
1999	690.47
2000	719.07
2001	747.73
2002	786.33
2003	838.89
2004	855.73
2005	891.82
2006	912.65
2007	939.18
2008	972.57
2009	996.26
2010	1010.98
2011	1041.19
2012	1076.42
2013	1113.58
2014	1150.55
2015	1187.37
2016	1232.01