Year	Number of
1990	827.06
1991	851.84
1992	879.9
1993	918.67
1994	961.17
1995	1000.04
1996	1034.62
1997	1068.47
1998	1104.93
1999	1143.29
2000	1178.39
2001	1202.46
2002	1224.9
2003	1238.92
2004	1253.05
2005	1259.92
2006	1262.97
2007	1269.74
2008	1274.81
2009	1289.79
2010	1314.09
2011	1324.68
2012	1334.79
2013	1352.91
2014	1373.35
2015	1393.24
2016	1412.96