1997

7.4

2023

8.1

2001

7.9

1991

8.3

1994

8.7

2018

8.2

2006

8.2

2009

7.6

2016

7.4

2007

8.1

1998

7.8

2023

7.0

2011

7.6

1995

8.4

2011

7.5

1999

7.3

2012

8.2

1994

8.5

2007

7.3

2012

7.4