1997

7.3

2016

8.6

2017

6.6

2009

7.4

2006

7.3

2012

7.4

2014

8.0

2015

6.4

2006

8.1

1982

7.8

1988

6.8

2016

7.2

2010

7.8

2007

8.1

2008

8.1

2005

7.3

2003

7.9

2024

8.5

1997

7.5

1988

8.0