1992

7.5

2002

6.0

1986

6.0

1976

5.6

1993

6.5

1984

5.0

1981

0.0

1972

4.1

1989

6.0

1977

7.6

1994

8.4

1970

6.1

1985

5.0

1979

0.0

1983

6.6

1990

7.0

1988

5.5

1974

5.3