Year	Number of
1990	5127.93
1991	5273.23
1992	5504.71
1993	5743.71
1994	5839.15
1995	5776.06
1996	5629.65
1997	5489.99
1998	5347.46
1999	5169.17
2000	5163.92
2001	5126.62
2002	5097.29
2003	5044.29
2004	4992.34
2005	5011
2006	4980.4
2007	5049.39
2008	5161.99
2009	5182.85
2010	5273.85
2011	5337.71
2012	5404.44
2013	5548.41
2014	5715.58
2015	5970.57
2016	6182.27