2005

6.2

2009

5.6

1970

6.1

2012

5.7

2018

5.8

1993

4.6

2016

6.7

1994

6.4

2017

6.4

2006

6.2

2013

7.5

1977

6.6

2020

6.5

1923

7.5

2014

6.6

1999

6.8

1972

6.8

1987

6.0

2010

6.7

1981

6.3