2015

6.0

2001

8.9

2008

6.8

2004

5.9

2006

6.9

2009

7.0

2016

7.7

2016

5.9

2004

7.5

1991

6.1

1999

5.1

2010

6.3

1997

6.2

1993

7.8

2011

5.9

1947

6.3

2019

6.2

1990

6.5

2014

7.5