Year	Number of
1990	2019.89
1991	2052.41
1992	2084.13
1993	2112.7
1994	2141.51
1995	2174.61
1996	2259.19
1997	2354.73
1998	2460.99
1999	2576.43
2000	2702.15
2001	2851.75
2002	3015.59
2003	3197.85
2004	3401.17
2005	3630.5
2006	3780.43
2007	3942.6
2008	4116.93
2009	4299.73
2010	4498.28
2011	4620.55
2012	4746.26
2013	4869.58
2014	4995.95
2015	5128.04
2016	5260.64