1984

8.5

2008

3.6

2007

4.6

2011

7.4

2005

6.8

2012

7.2

2022

7.0

2006

8.4

1984

7.8

1990

7.6

2000

7.8

10.0

2017

5.0

2023

7.7

2018

7.4

1999

7.5

2015

7.5

2001

7.6

1973

0.0

2020

6.5