1970

7.3

2001

7.5

2004

7.2

1980

7.7

2006

3.0

1936

6.0

2020

6.3

2007

9.0

2006

5.0

1980

7.0

2009

8.1

2016

0.0

2018

6.4

2008

5.4

2006

7.1

1989

6.8

2003

7.8

2006

10.0

2016

7.2

1965

6.9