1993

7.9

2009

6.6

2001

7.8

1975

6.9

2017

8.1

2002

7.6

2012

6.2

2003

7.6

2008

6.7

2010

7.7

1996

7.0

2011

7.5

2025

8.6

2004

8.1

1955

7.7

2006

7.9

1979

6.8

2008

7.7

2003

7.9

2012

7.7