8.0

2009

8.7

2015

7.6

7.8

2009

8.5

2014

5.9

2016

7.2

2021

7.7

2006

6.6

1955

6.1

1997

4.0

2016

7.0

1932

5.8

1963

5.9

2015

6.8

2008

7.5

2014

7.0

1963

3.0

1992

6.3