2011

6.8

2019

8.1

2014

7.9

2017

7.6

2013

7.8

1972

8.7

2019

8.5

1994

8.7

2019

8.2

2014

8.0

2020

7.2

2010

8.4

1999

8.4

2015

7.5

2016

7.0

2014

8.0

1985

7.7

2014

7.9

2017

7.6

2014

8.5