1997

8.0

2009

8.7

1997

8.0

2017

8.1

2019

8.7

2015

8.3

2011

8.5

1986

8.5

2018

7.8

1986

8.2

1972

7.7

1998

8.1

2011

7.7

2006

8.6

2016

8.5

2021

7.9

2017

8.0

1979

7.5

1998

7.0

2021

7.9