Year	Number of
1990	643.9
1991	691.7
1992	747.05
1993	812.74
1994	885.35
1995	963.51
1996	998.28
1997	1033.68
1998	1066.83
1999	1099.76
2000	1132.96
2001	1135.36
2002	1137.08
2003	1145.92
2004	1156.88
2005	1170.21
2006	1178.5
2007	1188.01
2008	1200.68
2009	1212.37
2010	1222.87
2011	1244.87
2012	1267.66
2013	1282.59
2014	1299.81
2015	1320.59
2016	1342.86