1977

6.9

1990

6.4

2006

6.1

1956

0.0

2017

6.0

1984

0.0

2009

6.5

2020

6.5

1997

0.0

1979

7.0

2004

5.6

1989

7.8

1975

6.4

1985

8.1

1974

7.7

1963

6.8

1967

6.2

1976

6.1

1966

6.5

1974

0.0