2006

5.6

1993

5.8

2011

7.0

2014

6.4

2017

6.1

2016

6.3

2014

7.8

1991

7.1

2010

5.9

1988

6.2

2013

7.3

2002

4.6

2021

7.6

2009

7.0

2013

6.2

1998

7.0

2014

6.2

1990

6.0

2009

6.0

2007

5.8