1994

7.5

1986

7.1

1961

8.0

2012

7.9

2007

7.2

1972

7.5

1993

7.7

1989

7.8

1977

7.4

1967

7.5

1957

8.1

1928

8.0

1986

6.4

1979

7.6

1957

7.9

1982

6.8

1999

7.3

1955

8.0

2017

7.3

1983

6.6