2007

5.7

2011

5.6

2012

6.3

1998

6.6

2020

6.3

2017

5.9

2008

6.4

2001

6.7

2005

5.5

2001

6.4

2013

6.3

2023

8.5

1988

7.0

2019

7.6

1996

6.5

2017

6.0

2015

7.4

1976

6.8

2012

7.2

2012

6.4