2010

6.6

1997

6.0

2014

8.4

2002

7.7

2011

6.3

1988

6.8

2020

7.4

2019

7.1

2018

6.9

2015

6.4

2009

6.7

1956

6.8

1994

7.2

2007

6.3

2013

6.9

2001

7.8

1896

5.2

2016

6.9

2015

7.5

2016

6.0