2005

9.7

2012

9.3

2019

8.7

1973

6.3

2020

7.0

1991

7.2

2014

6.1

2008

6.2

2004

9.9

2009

7.9

2001

6.8

2022

6.3

1967

6.9

1968

7.0

2014

7.1

1996

8.0

2015

5.7

2016

4.9