2018

4.0

2002

7.4

1995

7.9

2011

5.8

2014

5.1

2012

7.7

2008

5.9

2013

6.9

2008

4.7

2010

5.3

1967

6.4

1991

7.0

2006

5.8

2006

7.8

1986

6.8

2015

6.7

2003

5.7

2001

7.5

2011

7.4

1985

8.3