Year	Number of
1990	4300.04
1991	4428.37
1992	4559.13
1993	4684.09
1994	4806.05
1995	4938.05
1996	5051.97
1997	5173.32
1998	5300.2
1999	5424.53
2000	5548.32
2001	5672.37
2002	5800.75
2003	5930.24
2004	6072.18
2005	6231.51
2006	6349.62
2007	6478.2
2008	6612.35
2009	6750.95
2010	6896.9
2011	6977.01
2012	7057.75
2013	7138.36
2014	7217.62
2015	7295.55
2016	7373.66