2010

4.1

2016

5.9

1983

6.7

1990

6.4

2012

5.6

2015

5.7

2021

6.6

2017

6.9

2006

7.2

2007

7.5

2010

5.5

1957

6.2

2017

6.5

2008

6.4

2009

6.6

1987

7.1

2019

6.3

1989

6.3

2016

4.9

2019

6.7