1989

0.0

2005

5.9

2005

5.0

1984

5.3

2005

5.8

2010

6.8

2014

7.2

1978

7.1

2003

5.6

2012

6.7

2006

6.3

2007

5.6

2007

6.1

2005

6.1

2008

6.2

2008

7.7

2011

7.0

2017

6.8

2023

7.2

2022

0.0