Year	Number of
1990	776.73
1991	806.65
1992	838.41
1993	856.24
1994	904.66
1995	948.15
1996	1005.59
1997	1013.05
1998	1040.73
1999	1051.28
2000	1077.8
2001	1096.52
2002	1091.43
2003	1144.23
2004	1138.28
2005	1146.94
2006	1163.51
2007	1189.88
2008	1237.82
2009	1266.57
2010	1297.43
2011	1322.64
2012	1341.55
2013	1347.39
2014	1358.78
2015	1373.24
2016	1391.95