2017

8.9

1984

8.5

1985

7.9

2018

7.8

1998

7.2

2019

7.2

2014

8.0

2004

5.4

2013

7.7

2021

5.2

2014

3.3

1988

9.0

2006

9.0

1997

7.1

1993

7.0

2003

0.0

2001

6.2

2015

6.7

2022

6.8