1949

7.0

1981

6.7

2008

6.7

2010

6.7

1997

7.4

1997

6.4

2010

6.9

2018

7.8

1951

5.9

1946

6.8

1995

7.4

1994

7.9

1998

5.5

2019

7.3

2020

8.0

1972

0.0

2004

5.2

1972

6.5

1981

1.0

10.0