Year	Number of
1990	518.06
1991	520.79
1992	532.05
1993	557.93
1994	595.97
1995	631.82
1996	663.2
1997	687.69
1998	713.92
1999	752.33
2000	782.73
2001	805.9
2002	831.92
2003	866.73
2004	908.55
2005	939.96
2006	959.07
2007	976.65
2008	1003.58
2009	1051.3
2010	1104.73
2011	1151.74
2012	1200.78
2013	1233.94
2014	1255.11
2015	1269.18
2016	1299.86