2008

5.2

2020

5.4

2019

6.2

1960

6.5

2000

5.2

2004

5.9

2020

7.5

2021

7.2

2015

6.3

2017

6.7

2020

5.7

2006

8.3

2016

9.7

2018

5.9

1997

5.8

1999

8.0

2012

7.0

2016

5.6

2017

6.3

1979

6.7