Year	Number of
1990	994.15
1991	1022.08
1992	1051.1
1993	1081.46
1994	1113.51
1995	1150.55
1996	1200.62
1997	1253.68
1998	1309.07
1999	1367.09
2000	1428.18
2001	1492.1
2002	1559.5
2003	1629.78
2004	1706.24
2005	1794.35
2006	1862.27
2007	1930.72
2008	2002.09
2009	2074.53
2010	2152.64
2011	2187.58
2012	2223.76
2013	2258.77
2014	2297.2
2015	2341.18
2016	2388.78