2019

6.1

2013

6.9

2013

6.7

2011

6.7

1920

6.4

2012

6.2

2009

7.3

1989

7.2

2001

7.5

1984

6.4

2011

6.9

2020

6.8

2004

7.9

1969

7.8

7.8

2007

7.5

1996

5.8

1994

7.0

2014

7.7

2003

7.1