Year	Number of
1990	23196.53
1991	23974.04
1992	24825.78
1993	25711.17
1994	26632.7
1995	27598.71
1996	27830.95
1997	28140.51
1998	28487.42
1999	28829.9
2000	29269.57
2001	29364.03
2002	29446.47
2003	29541.16
2004	29661.26
2005	29766.72
2006	30212.83
2007	30728.22
2008	31284.4
2009	31827.09
2010	32355.39
2011	33194.51
2012	34061.28
2013	34963.38
2014	35838.23
2015	36815.98
2016	37835.54