1995

6.8

1990

6.5

2019

6.8

1979

6.1

2006

5.5

2007

5.3

2006

5.5

1962

6.2

1973

6.0

1943

5.4

2014

5.8

2021

6.5

2008

5.7

1957

6.3

1993

7.1

2008

4.0

2015

5.5

2009

6.5

1918

0.0

1980

6.7