2009

8.2

2019

8.1

2000

8.2

2020

7.7

2007

7.8

2018

6.8

2023

7.0

1990

7.7

2011

6.9

2021

7.8

2004

7.4

2016

7.9

2001

8.5

2015

7.6

2023

8.1

1981

7.3

2019

7.8

2023

7.9

1991

7.1

1996

7.4