2013

8.4

2011

7.1

2005

9.9

1977

6.8

2001

9.9

2004

6.1

2000

5.1

1942

5.8

1984

9.2

2006

9.8

2011

7.5

2007

7.0

2013

6.1

2017

7.6

2010

7.7

2017

4.9

2015

7.8

2020

9.4

2005

4.7

2018

7.2