2005

6.6

2007

7.0

2010

5.8

2005

5.1

2018

6.5

2008

6.9

2012

6.5

1971

6.4

1997

7.3

2006

6.0

2011

5.1

2021

6.2

2023

0.0

2020

8.4

1964

7.3

1983

6.6

2015

6.6

1979

7.3

2010

7.0

1974

8.6