Year	Number of
1990	449.44
1991	483.96
1992	522.93
1993	556.85
1994	603.41
1995	636.59
1996	667.38
1997	682.86
1998	690.55
1999	704.16
2000	714.75
2001	717.58
2002	712.01
2003	715.49
2004	712.51
2005	724.85
2006	730.67
2007	732.76
2008	733.47
2009	741.52
2010	740.67
2011	730.81
2012	728.72
2013	736.77
2014	742.58
2015	768.98
2016	790.15