2018
4.8
2017
6.7
2011
7.0
2012
6.1
1998
5.9
2010
6.6
2006
6.3
1995
7.6
2014
6.6
2018
6.1
2000
6.4
2005
7.3
2000
6.3
2011
6.8
1950
8.2
2011
7.5
2006
6.5
2001
7.3
2018
6.3
2005
6.7
2002
5.7
2008
6.1
1991
7.7
2004
5.5
2004
6.0
2010
7.0
1986
6.9
2006
5.1