2012

5.6

2014

6.2

2011

5.8

2003

6.3

1966

7.7

1940

7.8

2001

7.7

1989

6.6

2019

8.1

1985

6.4

1997

6.7

1981

6.5

1957

7.2

1962

6.9

2019

5.7

1939

7.5

1964

7.0

1985

7.0

2017

6.6

2020

6.4