1999

7.6

2016

6.0

1965

6.7

2013

6.5

2010

6.4

2006

7.6

2006

6.4

1997

6.6

2016

7.1

2020

7.1

2010

6.8

2013

6.2

2010

6.2

2009

6.1

2012

6.3

2001

5.8

2008

5.5

1994

5.9

2004

6.1

2008

6.4