1983

8.2

2007

6.7

1966

8.0

2013

8.0

1998

7.5

2007

7.8

1994

6.5

1960

8.3

2008

6.2

2014

6.9

2010

7.4

1996

7.0

1980

7.9

2003

6.3

1993

7.6

2016

7.9

1991

6.7

1997

7.4

1977

6.7

1972

7.8