2020

5.2

2019

6.8

2017

6.3

2019

5.4

2020

5.4

2009

6.7

2007

7.1

2018

5.0

1960

6.1

2018

6.1

2017

7.1

2003

7.2

1948

7.0

1993

5.8

2016

5.9

1982

7.6

2006

7.3

1998

5.9

6.6

2005

6.4