1998

7.2

2010

7.7

2001

6.6

2000

8.0

2004

8.3

2005

6.7

2024

8.1

2018

8.0

2001

7.9

2001

7.7

2022

6.0

1999

8.0

2009

8.1

2013

7.4

2007

6.9

1977

8.1

2006

8.2

2017

4.5

2007

8.5

2003

7.6