2011

5.4

2014

6.0

2013

5.7

2015

5.9

2008

7.2

2010

6.3

2001

6.2

2012

6.0

1975

7.8

1991

7.6

2007

5.7

2012

5.8

2024

8.0

2012

6.1

2012

5.8

2009

6.3

2010

6.1

2011

6.5

1993

6.7

2018

8.0