1976

6.7

2005

7.4

2000

7.4

1968

6.8

1988

6.3

1966

7.5

1995

8.2

1942

7.7

2002

6.4

1997

7.1

2023

7.0

1997

4.6

1996

4.7

1999

6.1

1935

6.4

1994

5.5

2006

6.8

2000

6.0

2003

5.2

2009

7.0