1972

6.0

2006

6.6

2002

6.7

1999

6.5

1987

7.1

2011

5.5

2002

7.0

2001

7.2

2025

6.3

1936

6.0

2007

6.7

2003

6.1

2005

6.3

2020

0.0

2023

8.1

1969

7.8

1976

6.8

2014

7.0

1949

7.9

2006

6.1