1966

7.0

1985

7.0

1978

0.0

1974

7.6

1985

7.7

1966

7.6

1960

3.4

2010

6.1

1995

7.8

2007

7.9

1979

4.9

1985

5.7

1977

6.0

1963

7.8

1987

8.0

1996

5.8

2005

6.5

1986

6.2