2005

5.4

2014

6.1

1985

6.3

1998

6.4

2007

6.9

2020

6.2

2015

4.4

1998

4.9

1988

7.8

2015

6.5

2009

8.0

2003

6.7

1921

7.4

1941

7.4

2012

4.8

1963

6.6

2009

5.2

2020

8.0

2017

5.2

2003

5.8