Year	Number of
1990	943.61
1991	964.12
1992	984.73
1993	1007.79
1994	1036.69
1995	1073.52
1996	1091.67
1997	1114.24
1998	1139.17
1999	1165.44
2000	1193.73
2001	1220.11
2002	1248.76
2003	1279.24
2004	1310.29
2005	1343.09
2006	1375.44
2007	1408.35
2008	1440.52
2009	1496.45
2010	1546.59
2011	1594.48
2012	1652.46
2013	1714.97
2014	1780.66
2015	1850.48
2016	1921.88