2004

7.6

2005

7.2

2007

5.4

2008

7.5

2003

6.4

2016

8.0

2008

8.9

2013

8.2

2001

7.8

1989

8.3

2006

8.6

2023

7.6

2013

8.0

2019

7.3

1998

7.1

1990

6.9

2019

8.7

2007

8.1

2018

8.3

2011

7.6