Year	Number of
1990	646.96
1991	677.27
1992	720.65
1993	772.33
1994	815.84
1995	855.91
1996	890.93
1997	924.56
1998	957.64
1999	1017.59
2000	1062.51
2001	1102.03
2002	1136.43
2003	1191.05
2004	1231.64
2005	1259.61
2006	1315.43
2007	1353.12
2008	1390.94
2009	1427.75
2010	1467.54
2011	1509.54
2012	1559.77
2013	1616.24
2014	1654.87
2015	1667.18
2016	1676.52