Year	Number of
1990	599.85
1991	622.11
1992	643.57
1993	666.57
1994	688.46
1995	709.58
1996	749.2
1997	789.39
1998	828.34
1999	868.68
2000	910.31
2001	961.37
2002	1013.4
2003	1062.97
2004	1113.49
2005	1165.7
2006	1165.45
2007	1165.51
2008	1168.79
2009	1173.24
2010	1178.67
2011	1194.68
2012	1212.9
2013	1230.84
2014	1250.78
2015	1272.66
2016	1304.36