Year	Number of
1990	572.97
1991	594.85
1992	616.38
1993	639.68
1994	661.71
1995	689.8
1996	712.93
1997	739.27
1998	765.37
1999	787.69
2000	809.7
2001	828.73
2002	847.12
2003	868.12
2004	888.85
2005	911.62
2006	937.63
2007	962.72
2008	993.29
2009	1024.27
2010	1057.46
2011	1090.51
2012	1122.12
2013	1155.75
2014	1189.96
2015	1225.56
2016	1273.72