Year	Number of
1990	1555.75
1991	1616.49
1992	1613.72
1993	1664.68
1994	1666.76
1995	1711.26
1996	1679.45
1997	1667.57
1998	1654.98
1999	1729.13
2000	1566.19
2001	1505.59
2002	1491.39
2003	1551.52
2004	1479.7
2005	1494.66
2006	1458.44
2007	1381.99
2008	1336.58
2009	1430.99
2010	1456.3
2011	1479.58
2012	1490.18
2013	1545.5
2014	1573.46
2015	1599.29
2016	1626.68