1992

7.5

2002

6.1

1986

6.1

1976

5.5

1993

6.6

1984

5.0

1981

0.0

1972

4.2

1989

6.0

1977

7.6

1994

8.3

1970

6.3

1974

7.0

1985

5.5

1979

0.0

1983

6.2

1990

7.0

1988

5.2