2007

9.0

2013

6.9

2008

6.8

1997

5.5

2005

6.0

2004

6.7

2006

6.9

2011

7.3

2003

7.0

2009

5.5

2020

6.9

2006

6.4

2017

5.2

2014

7.8

2005

6.0

1935

6.5

2021

9.2

2010

4.5

1977

6.7

2009

7.3