Year	Number of
1990	1038.57
1991	1090.64
1992	1144.38
1993	1200.17
1994	1259.62
1995	1324.12
1996	1301.79
1997	1282.29
1998	1264.68
1999	1248.52
2000	1235.17
2001	1278.34
2002	1325.03
2003	1373.76
2004	1420.82
2005	1465.25
2006	1465.22
2007	1466.13
2008	1466.77
2009	1468.19
2010	1465.48
2011	1447.6
2012	1434.37
2013	1421.58
2014	1413.73
2015	1406.36
2016	1399.67