1999

6.3

1995

6.2

1996

6.5

2016

7.5

2008

8.1

2010

8.1

2016

8.6

2008

8.9

2013

8.2

2005

7.6

2017

8.0

2022

8.4

2006

8.6

2011

8.5

2011

7.6

2016

8.0

2014

7.8

2021

7.9

2003

7.4

1990

6.9