2016

6.2

1993

6.5

2003

6.8

2012

5.8

2023

6.0

2001

7.2

2011

7.3

2020

6.0

1980

5.9

2010

6.6

1989

5.5

1953

7.2

1982

6.7

2012

7.0

1964

7.4

1937

5.5

2005

5.2

2009

6.1

2008

5.8

2013

4.8