1990

7.0

1960

7.1

2012

8.0

2025

9.9

2006

8.2

2014

7.2

1986

7.7

2010

7.8

2001

8.1

2010

8.2

2002

7.8

2010

7.7

2008

6.7

2006

7.1

2011

6.5

2013

6.6

2018

8.5

2005

6.2

1998

7.2

2020

10.0