1995

8.2

2010

9.1

2007

5.3

1972

4.5

2012

7.3

2014

6.5

2016

4.7

2017

6.2

1895

4.8

7.3

2015

5.9

6.3

2018

6.8

2021

7.4

2019

5.8

1985

6.7

2017

7.3

2016

7.0

2019

7.8

2011

7.0