2014

7.5

2016

8.6

2021

7.8

2011

8.5

2009

8.3

2019

8.7

2021

8.2

2017

8.1

2013

8.1

2014

7.5

2021

8.5

2018

7.7

2005

8.1

2001

7.8

1999

8.6

2006

8.6

2010

7.8

1969

8.3

1997

8.3

2005

8.2