2007

6.6

1996

8.1

2006

7.9

1990

7.8

1968

7.3

2009

7.7

2010

8.0

2012

6.7

2021

7.2

2007

7.2

1978

6.8

2002

6.4

2016

7.3

2014

7.9

2023

8.3

2020

6.9

2015

6.7

2021

6.7

2017

7.9

2005

8.1