1992

6.8

2004

7.2

2009

8.3

2000

8.0

2016

6.6

1995

7.1

2016

7.1

2010

7.6

2002

7.2

2021

6.6

2016

8.5

2011

7.8

2015

7.6

2022

7.5

1998

8.6

2018

7.3

1972

6.9

2023

6.0

2010

8.0

2008

7.6