Year	Number of
1990	1323.87
1991	1353.46
1992	1384.17
1993	1418.37
1994	1454.56
1995	1489.24
1996	1530.79
1997	1574.38
1998	1623.35
1999	1675.47
2000	1734.65
2001	1792.53
2002	1856.81
2003	1923.41
2004	1981.49
2005	2043.16
2006	2077.99
2007	2115.58
2008	2158.63
2009	2204.82
2010	2260.44
2011	2324.87
2012	2395.99
2013	2466.41
2014	2545.27
2015	2633.61
2016	2725.38