1988

3.5

1989

8.2

1981

6.5

1992

0.0

1995

6.9

2000

6.8

1963

7.9

1985

4.0

1994

6.2

1980

5.8

2004

10.0

1986

7.3

1993

5.5

1994

8.4

1977

7.6

1983

7.0