2015

6.7

2020

6.8

2010

7.7

2014

7.3

1997

7.5

2020

7.4

2021

8.3

2017

5.7

2000

6.8

2006

7.1

2016

7.7

2020

7.4

2000

7.9

2021

7.7

2005

7.6

2003

7.8

2008

7.6

2016

7.9

2019

8.0

1992

6.7