1994

7.0

2003

7.5

1997

7.0

1982

6.3

1971

7.5

2002

6.5

1980

5.5

1967

6.5

1961

7.4

2006

4.0

1996

6.8

1998

7.1

1962

7.1

1991

7.8

1976

7.9

1972

6.7

1975

6.7

2000

0.0

1955

0.0

1990

6.0