Year	Number of
1990	1192.47
1991	1243.48
1992	1292.14
1993	1360.66
1994	1432.25
1995	1489.36
1996	1504.09
1997	1532.28
1998	1546.25
1999	1585.76
2000	1608.07
2001	1637.49
2002	1673.87
2003	1698
2004	1747.88
2005	1790.25
2006	1815.58
2007	1827.22
2008	1840.74
2009	1864.31
2010	1883.35
2011	1878.23
2012	1878.78
2013	1874.11
2014	1864.82
2015	1861.45
2016	1866.33