1929

6.1

1990

5.1

2014

7.9

2006

6.4

1944

9.0

1995

6.3

2007

7.5

1968

5.0

2007

6.0

2007

7.2

1966

6.5

1982

6.5

2007

5.8

2008

5.8

2002

6.6

2025

4.7

1934

3.5

1997

6.6

2008

6.2

2014

6.0