1997

7.3

2011

4.7

2008

6.9

2003

7.7

2013

7.6

2008

8.3

2000

6.6

2015

7.6

2022

7.1

1991

7.7

2022

7.4

1996

7.6

2011

5.5

2010

7.5

2014

8.2

2020

7.2

2012

8.3

2015

9.0

2003

6.2