1998

5.5

1921

6.8

2004

6.1

1981

6.3

2005

4.7

1948

7.0

1955

7.4

1990

6.4

1953

6.9

2010

6.2

1981

6.2

1963

7.1

2000

4.3

1950

6.7

1965

7.5

1986

7.4

2012

6.2

1979

6.7

1988

6.2

1965

6.4