1973

7.5

2014

7.1

1958

6.4

1991

6.3

1999

7.2

1990

7.8

2003

7.6

1994

7.4

1980

6.0

1988

5.2

2013

5.3

1993

7.4

1956

7.1

1936

6.8

1994

7.3

1979

7.1

1987

7.3

1970

7.5

1991

7.2

2003

6.1