Year	Number of
1990	1206.36
1991	1185.59
1992	1164.53
1993	1148.58
1994	1138.26
1995	1140.62
1996	1109.99
1997	1102.08
1998	1081.11
1999	1060.25
2000	1058.76
2001	1055.25
2002	1053.9
2003	1066.21
2004	1088.17
2005	1118.41
2006	1173.74
2007	1221.23
2008	1278.76
2009	1343.96
2010	1409.11
2011	1471.57
2012	1537
2013	1615.53
2014	1706.28
2015	1797.87
2016	1905.41