Year	Number of
1990	1413.78
1991	1511.21
1992	1615.31
1993	1728.72
1994	1851.5
1995	1985.93
1996	2074.58
1997	2167.53
1998	2267.06
1999	2374.38
2000	2488.29
2001	2511.77
2002	2536.93
2003	2562.51
2004	2592.3
2005	2626.33
2006	2653.21
2007	2683.87
2008	2716.86
2009	2751.4
2010	2781.39
2011	2814.95
2012	2854.37
2013	2895.07
2014	2938.74
2015	2977.94
2016	3016.78