1994

6.0

9.5

2000

6.7

2005

4.1

1985

2.0

1987

6.2

1985

4.1

1982

6.0

1989

6.3

1986

0.0

1977

8.3

1979

6.8

1977

0.0

1994

8.3

1970

6.3

1977

6.3

1975

6.0

1984

6.7

1976

4.6

1980

5.5

1974

5.3