Year	Number of
1990	1109.2
1991	1169.58
1992	1227.39
1993	1271.22
1994	1317.1
1995	1369.54
1996	1426.92
1997	1476.98
1998	1533.35
1999	1568.45
2000	1597.94
2001	1621.44
2002	1637.34
2003	1687.5
2004	1732.58
2005	1767.87
2006	1770
2007	1764.67
2008	1800.56
2009	1803.65
2010	1824.69
2011	1860.61
2012	1903.54
2013	1952.74
2014	2036.86
2015	2116.65
2016	2178.06