Year	Number
1996	333.15
1997	262.14
1998	277.22
1999	266.47
2000	348.04
2001	323.2
2002	319.06
2003	321.88
2004	345.96
2005	393.28
2006	356.51
2007	409.88
2008	378.42
2009	434.36
2010	492.32
2011	585.84
2012	547.65
2013	536.58
2014	539.99
2015	530.9
2016	537.58
2017	503.14
2018	511.55
2019	606.36
2020	599.38