1973

6.9

2009

5.0

1971

6.4

1944

7.6

1988

6.8

1984

6.8

1985

6.4

1996

6.9

2000

6.9

1964

7.7

1966

7.1

1968

6.0

1957

8.1

1961

6.7

1989

7.2

2018

6.4

1987

7.3

1954

8.1

1987

6.2

1975

7.5