1972

7.9

2015

6.7

1988

6.8

2010

6.7

1939

7.5

1982

6.8

1946

7.8

1947

7.4

1963

7.2

1974

6.6

1995

6.8

1968

7.4

1987

6.2

1959

6.8

1984

5.4

1990

5.7

1985

5.5

1995

5.4

1965

7.7

2007

6.1