Year	Number of
1990	701.31
1991	723.91
1992	733.41
1993	748.19
1994	762.19
1995	782.14
1996	801.91
1997	825.37
1998	848.09
1999	878.88
2000	911.88
2001	937.89
2002	961.98
2003	996.63
2004	1063.67
2005	1105.14
2006	1135.52
2007	1158.53
2008	1184.3
2009	1207.03
2010	1229.53
2011	1247.25
2012	1261.16
2013	1258.76
2014	1268.93
2015	1276.52
2016	1314.54