Year	Number of
1990	965.77
1991	980.39
1992	1001.61
1993	1018.93
1994	1058.98
1995	1085.47
1996	1108.24
1997	1151.17
1998	1153.26
1999	1178.09
2000	1162.14
2001	1155.15
2002	1143.52
2003	1133.94
2004	1138.69
2005	1122.18
2006	1126.27
2007	1114.53
2008	1085.44
2009	1079.52
2010	1074.85
2011	1049.48
2012	1020.15
2013	999.43
2014	980.08
2015	967.16
2016	954.73