1996

8.0

2011

8.0

2002

8.7

2007

7.1

1979

6.8

2019

8.5

2016

1.0

1992

6.5

2015

5.0

1962

7.0

2001

7.2

1983

6.3

2004

7.4

1972

6.9

1992

7.5

2021

6.7

2012

7.7

2023

6.9

2019

7.1

2024

0.0