1958

6.7

1978

7.5

1981

6.3

1953

6.2

1973

7.0

1954

5.5

1980

5.0

1993

5.5

1998

7.0

2020

7.9

1965

6.1

1975

7.0

1977

5.8

1996

5.7

1990

6.9

2005

8.2

2011

0.0

1975

7.0

2001

0.0

1998

0.0