6.4

2022

4.5

1975

4.5

2019

5.7

2021

6.2

2008

5.2

5.0

2014

5.9

2012

7.2

5.7

2010

6.5

2004

5.0

1976

5.9

2015

7.9

2009

6.9

1970

4.6

1981

5.9

2014

8.5

1973

9.0

2010

7.0