2006

7.0

2011

5.7

2003

5.8

2009

5.1

2008

6.6

2010

7.1

2001

7.0

2010

7.7

2017

6.8

2019

7.1

2014

7.0

1895

5.4

2009

5.5

1991

7.3

1976

7.3

2004

7.9

1996

6.7

2020

5.2

2012

5.3

2014

7.5