2012

5.9

2008

6.5

2018

6.8

2009

5.7

2019

7.7

2007

6.3

1999

7.6

2013

7.0

2011

6.6

2003

7.8

1961

7.2

1989

7.0

2007

6.0

2005

7.5

2008

6.6

2015

6.8

2011

5.7

2012

6.9

2017

6.9

2011

6.9