1981

7.2

1990

7.3

2003

8.1

1983

0.0

1955

7.0

1992

7.5

1929

7.5

1919

0.0

1996

6.1

1988

7.3

2006

6.6

1987

6.6

2007

6.7

1968

7.4

1935

5.8

1970

6.2

1982

0.0

1990

6.6

1971

5.2

1984

6.7