1981

5.4

1997

8.0

1983

5.5

1981

0.0

2010

9.0

2003

7.8

1989

1.5

1977

3.3

1982

5.3

1992

5.0

1977

5.3

1975

6.7

1993

0.0

1988

5.0

2008

6.6