2003

5.9

2009

6.6

1997

6.1

2017

6.7

2013

8.5

1988

6.3

1996

6.4

2002

6.3

2005

4.0

2021

7.0

2001

7.3

2016

3.3

2005

5.3

2023

0.0

2002

6.8

2019

6.2

2020

0.0

1970

7.2

1964

7.1

2014

6.7