2013

8.6

2016

6.4

2014

7.6

2002

10.0

2017

5.7

2021

8.4

2011

7.0

8.0

2006

5.4

1992

6.8

1984

5.7

2019

6.8

1938

4.0

2018

7.8

2012

6.8

2011

6.5

1999

5.8

1982

6.8

2020

6.2