1998

8.3

1976

8.1

1996

7.5

2018

6.9

1998

6.6

2015

4.0

2002

6.8

2023

7.7

2017

4.0

2006

6.5

2021

0.0

2018

6.9

2007

7.9

1977

6.2

2021

7.5

2006

5.7

1964

7.6

2004

6.2

2002

6.3

1989

7.1