1952

7.4

1984

6.3

1981

6.8

1986

7.0

2007

6.8

2001

6.9

2002

7.1

1983

9.5

1957

8.3

1965

6.3

1925

7.6

2000

7.2

1982

7.5

1938

6.4

2006

7.4

2019

6.9

1943

8.2

1930

7.7

1979

8.3

2008

6.5