Year	Number of
1990	1674.97
1991	1703.83
1992	1721.65
1993	1746.39
1994	1755.27
1995	1790.59
1996	1813.73
1997	1818.56
1998	1827.97
1999	1830.63
2000	1844.13
2001	1861.84
2002	1845.57
2003	1852.38
2004	1825.64
2005	1865.57
2006	1857.11
2007	1848.7
2008	1843.86
2009	1843.3
2010	1836.19
2011	1840.17
2012	1868.09
2013	1848.16
2014	1840.3
2015	1842.77
2016	1849.33