2015

7.7

2020

8.4

1999

8.7

2013

7.9

2014

7.7

1989

8.3

1993

7.9

1966

8.0

2019

7.4

2008

7.6

2007

7.7

2006

7.6

2008

8.9

2004

7.8

1980

6.4

2018

7.3

2022

7.7

2023

8.5

2015

8.3

2015

7.9