2001

5.3

2016

6.3

2013

5.4

2022

5.8

2015

6.7

2009

6.9

2007

5.4

2005

5.8

2007

5.4

2006

5.5

1991

5.7

1982

6.1

1957

6.4

2019

7.1

2016

6.7

1970

5.7

2005

4.8

2006

6.3

2012

6.4

2006

6.4