Year	Number of
1990	1770.46
1991	1809.23
1992	1847.04
1993	1898.79
1994	1904.17
1995	1885.97
1996	1831.26
1997	1781.11
1998	1744.39
1999	1700.14
2000	1615.48
2001	1579.37
2002	1534.37
2003	1467.77
2004	1451.65
2005	1418.3
2006	1361.08
2007	1297.53
2008	1281.06
2009	1297.72
2010	1281.11
2011	1270.51
2012	1185.36
2013	1149.54
2014	1104.52
2015	1117.4
2016	1133.39