1983

7.9

1989

7.0

1957

8.2

2011

7.0

1995

6.9

1947

7.3

2011

7.0

1986

7.6

1985

7.7

1976

7.5

2007

7.1

1974

6.5

1964

7.3

1966

7.2

1982

6.7

1988

7.8

2013

5.9

2007

6.3

2011

8.1

1962

8.0