Year	Number of
1990	555.01
1991	590.93
1992	630.24
1993	672.86
1994	718.82
1995	768.3
1996	802.46
1997	838.24
1998	875.27
1999	913.63
2000	953.55
2001	976.18
2002	998.94
2003	1022.18
2004	1046.46
2005	1072.63
2006	1092.96
2007	1114.72
2008	1138.91
2009	1165.19
2010	1193.9
2011	1227.52
2012	1264.12
2013	1303.34
2014	1345.28
2015	1389.91
2016	1433.24