Year	Number of
1990	906.51
1991	954.27
1992	1004.58
1993	1057.07
1994	1112.44
1995	1171.48
1996	1208.81
1997	1249.45
1998	1291.89
1999	1334.56
2000	1376.54
2001	1417.88
2002	1458.86
2003	1499.8
2004	1542.27
2005	1587.67
2006	1610.62
2007	1634.62
2008	1659.82
2009	1686.85
2010	1715.96
2011	1727.59
2012	1740.81
2013	1755.68
2014	1771.43
2015	1787.9
2016	1804.06