2012

8.1

2014

7.8

2017

6.0

1998

7.4

1973

6.9

1991

7.7

2018

7.0

1993

7.6

2009

8.3

2016

6.8

2020

8.8

2005

6.8

2005

7.4

2016

7.1

1984

7.3

2020

7.5

2009

8.0

2020

7.7

2017

7.5

2012

8.1