2006

6.5

1991

6.7

2011

7.9

2013

6.6

2018

6.2

2007

7.4

2014

6.3

2007

6.6

2020

7.3

1996

5.5

1996

7.0

2023

5.6

2009

7.8

1990

7.4

2002

7.3

2004

7.5

1998

6.2

2001

5.8

2008

6.8

1995

5.4