Year	Number of
1990	754.5
1991	753.97
1992	760.74
1993	761.89
1994	774.28
1995	779.16
1996	787.87
1997	812.08
1998	824.41
1999	845.46
2000	862.63
2001	878.58
2002	892.43
2003	896.91
2004	875.85
2005	870.98
2006	903.06
2007	913.39
2008	923.27
2009	952.23
2010	982.09
2011	1000
2012	1013.08
2013	1029.77
2014	1043.39
2015	1054.45
2016	1069.75