1980

7.1

1999

8.4

2014

7.8

2024

8.2

2016

8.6

2008

8.9

2019

8.7

2012

6.8

2016

8.4

1989

8.0

2011

8.5

2021

7.9

2013

8.7

2014

7.9

1999

7.4

2005

8.3

2017

8.2

2017

8.5

2009

8.3

2005

8.2