Year	Number of
1990	1169.75
1991	1228.74
1992	1291.17
1993	1354.56
1994	1422.35
1995	1498.65
1996	1578.53
1997	1665.56
1998	1759.52
1999	1860.69
2000	1975.18
2001	2049.27
2002	2132.27
2003	2226.35
2004	2333.31
2005	2444.96
2006	2482.86
2007	2531.95
2008	2592.04
2009	2656.72
2010	2716.85
2011	2825.71
2012	2939.43
2013	3057.94
2014	3182.88
2015	3306.63
2016	3433.97