2013

8.6

2007

7.5

2018

8.2

1976

7.0

1985

6.5

1982

7.3

2017

8.1

2010

6.3

1964

7.9

2019

8.3

1998

8.2

2008

5.8

2023

7.1

2000

7.6

2009

7.6

1994

7.4

2018

7.2

2015

8.6

2015

7.8

2020

7.6