1996

6.5

2017

7.3

2009

6.7

1941

8.0

1984

7.5

2008

7.3

2009

7.7

1983

7.9

1982

7.9

2014

8.1

2008

8.1

1998

8.1

2016

7.0

2012

7.4

1995

7.6

1994

8.7

2010

7.8

2004

8.0

1972

8.7

1995

8.0