2011

6.8

2012

5.0

1972

7.5

2010

7.2

2007

6.9

2012

4.7

2005

7.3

2018

5.7

2009

6.7

1971

6.7

2015

5.7

1998

7.4

2002

4.7

2017

8.5

2015

4.6

2015

5.9

2019

6.3

2008

6.8

2018

7.0

2014

7.2