2010

7.5

2011

5.7

2009

4.6

6.1

2009

7.4

2017

6.0

2001

5.2

2007

7.6

2014

5.6

2020

7.0

1972

4.0

2014

6.8

2021

5.7

2006

7.0

2005

7.1

2011

7.2

1988

6.6

1946

7.8

2003

6.8

2011

6.2