2014

7.6

2010

6.6

2011

7.1

2013

7.2

2012

7.7

1962

7.9

2021

7.4

2020

7.4

1979

7.5

1993

7.0

1972

7.3

2018

6.0

1967

6.8

1998

7.4

1950

8.0

2004

6.6

1947

6.3

2011

7.1

1946

5.9

2003

7.7