1977

7.0

1993

5.5

2010

6.2

1920

6.4

2009

7.4

2019

7.7

1994

6.5

1953

6.6

2003

7.4

1995

7.3

2008

7.4

2001

7.2

2013

8.1

1943

6.1

2001

7.4

2009

7.3

2010

6.9

2020

6.1

2004

5.7