Year	Number of
1990	615.22
1991	653.15
1992	696.1
1993	743.82
1994	795.88
1995	852.86
1996	896.43
1997	941.55
1998	988.69
1999	1038.77
2000	1092.17
2001	1071.85
2002	1055.89
2003	1043.34
2004	1033.25
2005	1025.79
2006	1059.15
2007	1094.96
2008	1134.77
2009	1178
2010	1223.31
2011	1287.85
2012	1358.89
2013	1435.9
2014	1519.35
2015	1609.47
2016	1705.58