1973

7.2

2016

7.7

2016

6.5

2020

5.8

1997

6.1

2011

8.0

2011

9.7

1961

8.0

2008

4.2

2012

6.8

2020

6.1

2015

7.5

2004

10.0

2023

7.6

1974

5.4

2014

5.0