1987

8.1

2005

7.4

1980

6.7

1971

7.5

1957

8.3

2006

7.5

1989

7.2

1981

7.0

1978

8.0

1980

6.7

1987

6.6

1982

0.0

2005

6.7

1979

8.3

1989

7.0

1998

7.4

1970

7.0

1986

7.7

2010

4.8

1959

7.7