2006

5.4

1990

7.0

2017

7.2

2005

6.2

2020

6.4

1937

7.1

1994

6.5

2017

6.8

1993

4.6

2018

7.6

2019

6.8

2008

5.8

2017

6.1

2018

6.8

2009

6.7

1956

7.2

1999

6.5

1923

7.5

1980

6.3

2010

6.7