1989

6.0

1999

7.9

2011

8.5

1990

8.0

2017

7.9

2016

8.4

2023

8.1

2009

8.2

2007

8.1

1978

7.1

2022

8.2

2020

8.4

1994

7.8

2001

7.8

2001

8.6

2015

7.5

2024

8.3

1989

8.0

2006

7.5

2015

8.0