Year	Number of
1990	27521.63
1991	28835.57
1992	30145.79
1993	31445.05
1994	32833.17
1995	34409.87
1996	35946.79
1997	37552.76
1998	39251.79
1999	40990.86
2000	42782.3
2001	43768.89
2002	44745.8
2003	45763.6
2004	46861.54
2005	48062.39
2006	48783.33
2007	49466.11
2008	50123.4
2009	50778.43
2010	51458.85
2011	52296.96
2012	53286.29
2013	54356.77
2014	55451.53
2015	56570.71
2016	57726.22