2011

7.4

2017

5.0

2007

6.3

1971

8.2

2019

8.5

1994

8.7

2017

7.6

2013

7.5

1996

7.9

2000

7.1

1975

8.4

2009

7.3

2014

8.5

1972

8.7

2018

7.5

2001

7.6

2017

7.2

2016

7.3

2008

8.5

2016

7.9