1896

4.2

1993

5.5

2012

5.9

2014

4.5

2003

5.8

1988

5.5

2020

6.0

1996

6.4

2017

6.9

1965

6.8

2017

4.8

1989

5.8

2008

7.8

2009

7.3

2001

8.0

1929

5.5

1973

6.5

2012

6.0

2016

4.2

2018

7.0