1999

7.2

1992

7.0

2018

8.2

1989

8.3

1976

8.1

2014

8.0

2017

7.3

2010

8.2

1997

7.9

2016

6.3

2019

7.8

1980

8.2

2014

8.5

2021

7.8

2014

8.4

2000

7.4

2000

8.1

2016

7.9

2013

7.8

2015

7.6