Year	Number of
1990	732.19
1991	753.79
1992	777.12
1993	824.65
1994	855.31
1995	900.45
1996	923.25
1997	936.79
1998	958.38
1999	989.55
2000	1019.62
2001	1048.13
2002	1049.62
2003	1063.43
2004	1060.14
2005	1079.8
2006	1097.05
2007	1101
2008	1107.79
2009	1115.35
2010	1135.38
2011	1159.76
2012	1184.48
2013	1205.88
2014	1227.21
2015	1247.59
2016	1270.67