2003

4.7

2014

3.5

2009

6.3

1992

7.4

2001

6.7

2020

5.0

2021

7.4

1997

6.5

1992

7.0

2016

6.9

2006

7.0

2008

7.6

2015

5.3

2006

5.4

1998

7.0

2013

6.7

2012

6.5