1997

8.0

2019

8.1

2017

7.6

2020

7.2

1999

8.4

2014

7.9

2013

7.8

1972

8.7

2016

7.4

2021

7.9

2017

7.6

2019

8.5

1994

8.7

2014

8.0

2015

7.6

2014

8.5

2017

7.3

2015

7.5

1994

8.5

1999

8.2