1978

6.7

1983

3.2

1982

8.0

1971

5.8

2011

7.0

1978

7.5

1975

5.7

1989

5.5

1981

4.4

1973

6.2

2007

3.3

1980

5.4

1978

7.7

1971

3.3

1973

0.0

1997

4.9