2020

7.4

2007

7.5

2006

4.5

2018

6.8

2003

5.0

2001

7.6

2014

6.7

2015

6.7

2015

6.8

2011

5.7

2016

8.6

2016

7.1

2017

7.6

2006

4.7

2013

5.6

2009

7.0

1999

7.9