Year	Number of
1990	2655.83
1991	2663.88
1992	2582.89
1993	2488.75
1994	2450.28
1995	2406.56
1996	2334.09
1997	2271.08
1998	2256.93
1999	2308.35
2000	2277.44
2001	2232.32
2002	2171.05
2003	2152.8
2004	2124.14
2005	2116.97
2006	2116.51
2007	2112.91
2008	2084.27
2009	2066.24
2010	1997.43
2011	1988.65
2012	2020.28
2013	2004.72
2014	1958.97
2015	1935.65
2016	1925.36