1999

7.6

2014

8.5

1997

7.9

2016

7.0

1994

8.7

2006

7.4

2018

8.0

2015

7.8

2014

7.7

2005

6.1

1972

8.7

2003

7.8

2023

8.1

1984

7.5

2020

7.3

1994

8.5

2022

7.3

2009

7.6

2018

8.4

2006

6.6