Year	Number of
1990	1108.91
1991	1136.42
1992	1166.99
1993	1200.72
1994	1234.7
1995	1269.08
1996	1295.07
1997	1322.37
1998	1347.99
1999	1377.01
2000	1411.53
2001	1447.16
2002	1489.12
2003	1533.95
2004	1580.89
2005	1630.58
2006	1676.77
2007	1722.76
2008	1777.2
2009	1834.16
2010	1895.91
2011	1957.16
2012	2023.94
2013	2092.47
2014	2165.86
2015	2244.3
2016	2326.75