1971

9.0

2009

5.6

2020

5.6

1923

8.5

1996

9.4

2017

5.9

2019

9.8

2017

9.5

2020

6.9

2010

5.3

2003

6.4

2016

6.7

2010

5.0

7.3

2012

6.4

2004

4.5

1993

4.6

2020

7.8

2019

7.3