Year	Number of
1990	27476.79
1991	28531.44
1992	29584.6
1993	30418.35
1994	31390.64
1995	32461.62
1996	32244.99
1997	32079.76
1998	31873.44
1999	31592.28
2000	31307.74
2001	32005.75
2002	32704.73
2003	33443.15
2004	34100.99
2005	34855.57
2006	35121.2
2007	35425.85
2008	35675.97
2009	35947.3
2010	36301.63
2011	36618.83
2012	36998.75
2013	37333.05
2014	37691.69
2015	38490.52
2016	39446.97