Year	Number of
1990	577.34
1991	620.5
1992	678.19
1993	748.41
1994	821.88
1995	887.97
1996	926.92
1997	955.1
1998	978.69
1999	1006.69
2000	1043.06
2001	1089.88
2002	1140.87
2003	1198.16
2004	1256.72
2005	1312.4
2006	1355.84
2007	1392.33
2008	1428.74
2009	1463.89
2010	1506.63
2011	1556.62
2012	1616.8
2013	1685.82
2014	1762.16
2015	1841.66
2016	1927.68