1967

5.1

2012

6.7

1932

6.1

1940

6.2

1996

4.9

2004

6.7

2000

6.0

1986

7.4

2002

5.6

2005

6.9

1990

6.4

2007

5.6

1987

7.3

1955

6.5

1997

6.1

1968

6.5

2003

5.8

1990

5.7

2006

6.4

2004

5.2