1971

7.6

1967

8.2

1984

8.3

2014

6.5

1983

7.2

1991

7.0

2017

7.4

2002

7.8

1979

0.0

1977

7.4

2020

6.0

1990

7.2

2022

7.9

2006

3.5

1997

0.0

1950

6.0

1973

9.3

1978

5.0

2001

0.0

2007

7.6