1993

2.6

1997

5.4

2018

1.0

2009

6.2

2015

7.0

1992

5.8

2007

6.0

2012

5.9

2024

3.0

2015

6.9

2011

5.5

2010

6.0

2006

3.5

2001

6.2

2009

5.8

2006

6.3

2022

3.0

2014

6.5