Year	Number of
1990	692.87
1991	707.03
1992	732.3
1993	766.96
1994	797.92
1995	827.07
1996	849.57
1997	872.8
1998	895.38
1999	913.84
2000	942.51
2001	961.78
2002	998.41
2003	1030.9
2004	1072.23
2005	1119.87
2006	1161.3
2007	1203.87
2008	1247.7
2009	1289.05
2010	1336.33
2011	1380.12
2012	1424.14
2013	1479.65
2014	1534.89
2015	1593.08
2016	1650.16