2001

5.3

1994

7.3

1985

6.4

1985

4.1

1978

8.0

1997

7.5

1979

6.8

2001

8.4

1984

7.0

1991

6.4

1993

6.7

1977

7.4

1975

7.7

1990

0.0

1972

5.8

1994

6.0