1952

7.8

2013

8.1

2016

7.6

2009

7.6

1985

8.3

1994

8.5

2018

8.0

2010

8.4

2003

7.7

1994

8.7

2015

7.4

2006

8.2

2017

7.0

2014

7.7

2006

7.8

2019

8.5

2004

8.1

2018

8.2

2017

7.6

1972

8.7