1985

6.1

2016

6.7

2006

5.9

2009

7.4

1986

5.8

2012

6.5

1972

6.3

2022

5.6

2011

7.5

2014

6.0

1968

6.9

2015

6.4

2020

7.4

2017

4.6

2004

7.3

2017

8.6

2013

7.6

2016

7.9

2007

6.4