1999

6.4

1994

8.7

1985

8.3

2014

7.7

2019

8.5

1997

7.9

2017

7.6

2000

7.1

2016

7.3

2022

7.7

1972

8.7

2010

8.4

2017

7.2

2014

8.5

2016

7.9

2008

8.5

2023

7.6

2013

7.2

2013

7.3

2004

8.0