Year	Number of
1990	2050.8
1991	2165.51
1992	2308.66
1993	2448.35
1994	2547.76
1995	2581.36
1996	2593.13
1997	2576.34
1998	2579.72
1999	2594.18
2000	2642.3
2001	2711.37
2002	2786.55
2003	2854.65
2004	2920.08
2005	2983.42
2006	3066.16
2007	3143.44
2008	3214.69
2009	3276.58
2010	3369.79
2011	3445.22
2012	3496.02
2013	3552.74
2014	3647.53
2015	3822.64
2016	3986.93