Year	Number of
1990	769.94
1991	810.56
1992	848.79
1993	891.92
1994	928.64
1995	961.6
1996	1001.03
1997	1041.84
1998	1069.93
1999	1100.46
2000	1134
2001	1174.37
2002	1219.66
2003	1256.23
2004	1303.93
2005	1358.05
2006	1407.53
2007	1467.22
2008	1525.32
2009	1583.6
2010	1655.03
2011	1729.47
2012	1819.29
2013	1889.72
2014	1949.6
2015	1970.01
2016	1951.97