1982

5.9

1968

6.9

1969

5.1

1964

7.0

1993

7.3

1965

7.5

1952

6.7

1976

7.0

2004

6.8

2012

7.2

1951

7.2

1967

6.5

2007

5.6

1979

6.2

1944

7.2

2011

3.6

2020

6.1

1986

6.3

1962

6.9

2002

6.5