1995

7.3

1957

8.1

1954

8.4

1991

7.0

1984

7.3

1990

7.0

2006

6.6

2012

7.2

1946

7.6

1980

6.7

1997

7.9

1989

7.0

2003

8.5

2002

6.1

1933

7.7

1950

8.1

2010

7.9

1987

6.2

2008

7.8

1969

7.0