2014

7.6

1999

7.0

2008

7.5

2010

7.7

2009

8.1

2020

8.4

2012

8.7

1998

7.2

2019

8.0

2012

7.7

2017

8.2

2015

7.3

2009

7.3

2009

7.2

1997

7.3

2021

8.0

2003

7.6

2001

6.8

2016

7.4

2007

4.3