2018

6.7

2007

6.6

2012

6.9

2002

7.4

2019

8.2

2015

7.3

2007

7.7

2006

7.7

2011

6.0

2005

7.8

2008

6.6

2008

8.5

2016

7.4

2006

7.1

1987

4.6

2006

5.6

2021

6.1

2007

6.1

2009

8.0

2020

6.4