Year	Number of
1990	1002.8
1991	988.09
1992	983.43
1993	967.22
1994	950.75
1995	920.22
1996	943.09
1997	956.8
1998	955.23
1999	976.4
2000	1009.64
2001	1040.08
2002	1079.16
2003	1108.51
2004	1147.67
2005	1185.94
2006	1226.17
2007	1280.26
2008	1330.63
2009	1392.21
2010	1449.96
2011	1492.94
2012	1534.03
2013	1591.17
2014	1651.56
2015	1715.63
2016	1785.21