2008

7.6

1998

7.1

1988

8.0

2004

8.1

2006

8.6

2016

7.1

2017

7.1

1990

8.0

2012

6.3

2011

6.8

2025

6.3

2010

8.0

2005

7.2

2001

7.8

1996

6.8

2015

7.4

2009

7.4

1969

8.2

2013

8.0

1985

7.9