1998

8.6

2006

9.3

2008

6.7

1991

7.6

2012

6.7

1999

8.2

2017

10.0

1969

7.8

2025

8.0

2020

9.8

2021

8.1

2008

7.6

2014

5.8

2020

6.1

1973

6.8

2004

7.9

2015

7.9

2009

7.1

2011

7.5