1971

6.8

2006

6.9

2015

8.4

1975

6.9

2003

7.0

1993

5.5

2023

0.0

2015

6.3

2018

7.1

2009

7.7

2014

4.5

2011

6.7

2015

7.8

2001

7.8

2023

8.0

2008

7.2

1989

7.8

2017

6.0

2005

6.8

1989

7.9