1967

7.7

1962

7.9

2013

7.6

1941

8.0

2009

7.5

1993

6.1

1987

7.8

2006

4.1

2020

7.4

2012

6.4

2013

7.2

2010

7.0

2017

7.7

1969

6.6

2013

8.1

2011

7.1

2003

6.1

2011

6.4

2014

5.0

2010

7.3