JavaScript chart by amCharts 3.21.15
7
6.4
5.5
4.3
2.7
2.2
1.9
2.4
3
3
2.8
1975
1980
1985
1990
1995
2000
2005
2010
2015
2016
2017
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5