1986

6.0

2007

7.7

2014

7.9

1988

6.5

2015

7.3

2004

8.0

1976

6.6

2005

7.8

1968

6.6

2008

8.1

2017

7.6

2001

7.9

1979

8.2

1967

6.9

2014

6.9

2017

7.3

1989

6.1

2011

8.1

1965

7.7

2002

7.7