1955

7.4

1956

7.2

1957

7.2

2002

7.3

2019

6.0

1992

7.5

1998

6.4

1963

7.1

1983

7.4

1991

7.6

1989

7.5

1938

5.7

2008

6.3

1994

6.8

2013

6.7

1988

6.9

1997

7.0

1994

5.6

1970

7.5

1995

6.9