2009

7.7

1960

7.4

2015

7.0

2001

7.8

2012

6.6

1993

8.2

2004

7.1

2011

5.9

2006

8.1

2010

8.2

2014

8.1

2012

7.0

2006

7.4

2015

8.3

2004

7.9

2016

8.2

2011

4.7

1990

7.6

1997

7.1