Year	Number of
1990	541.49
1991	554.05
1992	569.52
1993	590.72
1994	611.18
1995	628.61
1996	653.37
1997	676.73
1998	696.5
1999	718.05
2000	737.9
2001	769.42
2002	798.21
2003	829.17
2004	861.42
2005	898.22
2006	934.14
2007	969.94
2008	1015.49
2009	1066.39
2010	1120.01
2011	1144.72
2012	1181.49
2013	1203.96
2014	1241.89
2015	1282.09
2016	1318.94