2009

4.8

2012

5.3

1993

6.1

2001

5.4

1987

7.5

2014

5.5

1971

7.1

2018

6.5

2017

6.3

1968

7.1

2003

5.8

2014

5.2

1976

7.3

2010

5.0

2016

7.1

2007

7.1

1962

7.8

2006

7.0

1992

6.2

2008

7.7