Year	Number of
1990	695.14
1991	734.46
1992	770.47
1993	808.97
1994	848.18
1995	889
1996	925.77
1997	966.07
1998	1009.49
1999	1058.7
2000	1107.63
2001	1120.41
2002	1136.32
2003	1155.46
2004	1185.47
2005	1230.46
2006	1313.07
2007	1409.39
2008	1515.31
2009	1622.7
2010	1741.6
2011	1784.1
2012	1853.9
2013	1909.19
2014	1958.63
2015	1987.66
2016	2040.97