1972

0.0

1994

7.2

1981

5.5

1989

6.7

1995

7.3

1979

6.8

1993

6.9

1984

7.5

1976

6.3

1987

5.0

1982

6.5

1976

8.1

1994

4.4

1985

6.5

1981

5.9