2004

7.3

2019

7.0

2015

6.1

2001

6.8

2012

7.7

1983

7.9

2014

7.5

2009

6.2

1985

6.0

2011

6.4

2002

8.0

2014

7.7

2008

5.8

1993

6.2

2013

6.5

2019

6.5

1987

7.2

2004

8.0

2013

7.6

2008

7.6