Year	Number of
1990	1136.75
1991	1132.31
1992	1127.91
1993	1115.72
1994	1110.34
1995	1112.81
1996	1163.49
1997	1218.01
1998	1275.4
1999	1332.95
2000	1391.4
2001	1450.84
2002	1514.85
2003	1598.82
2004	1682.74
2005	1765.25
2006	1831.44
2007	1893.87
2008	1962.46
2009	2034.77
2010	2114.56
2011	2147.1
2012	2185.48
2013	2224.87
2014	2266.76
2015	2310.89
2016	2363.87