Created with Raphaël 2.1.2
1.94M
2016
0.20
0.40
0.60
0.80
1.00
1.20
1.40
1.60
1.80
2.00M
1.98M
2006
2.06M
2007
2.03M
2008
2.02M
2009
1.96M
2010
1.91M
2011
1.84M
2012
1.99M
2013
1.98M
2014
2.04M
2015
1.94M
2016