Year	Number of
1990	390.59
1991	405.61
1992	424.73
1993	440.94
1994	454.66
1995	469.57
1996	488.64
1997	512.64
1998	539.57
1999	566.48
2000	591.77
2001	638.01
2002	690.53
2003	748.6
2004	808.71
2005	871.81
2006	898.85
2007	927.09
2008	953.61
2009	980.33
2010	1007.28
2011	1008.67
2012	1013.25
2013	1020.2
2014	1028.7
2015	1037.83
2016	1047.74