Year	Number of
1990	752.04
1991	816.37
1992	884.39
1993	942.47
1994	1028.89
1995	1114.15
1996	1181.26
1997	1229.06
1998	1275.06
1999	1301.85
2000	1308.13
2001	1313.08
2002	1301.28
2003	1312.97
2004	1271.95
2005	1255.9
2006	1253.11
2007	1237.71
2008	1221.68
2009	1218.02
2010	1215.11
2011	1213.2
2012	1207.13
2013	1205.24
2014	1200.08
2015	1211.37
2016	1235.75