Year	Number of
1990	2097.24
1991	2118.15
1992	2131
1993	2151.11
1994	2143.41
1995	2136.29
1996	2139.27
1997	2123.81
1998	2130.94
1999	2142.17
2000	2128.31
2001	2132.78
2002	2144.8
2003	2130.27
2004	2110.47
2005	2070.22
2006	2037.29
2007	2013.97
2008	1993.01
2009	1988.9
2010	1969.8
2011	1938.36
2012	1919.34
2013	1892.58
2014	1873.97
2015	1858.04
2016	1884.44