2003

6.3

2009

5.9

2008

6.9

2017

5.9

1981

7.2

2014

7.0

2001

6.4

2011

6.7

2016

7.3

2014

5.4

2001

6.1

2018

6.6

1972

6.2

5.0

2006

6.0

2004

7.5

2009

6.4

2003

6.3

2022

6.5

2018

5.0