2006

0.0

2015

6.1

2011

6.9

2009

4.8

1980

5.8

1952

7.0

1987

6.6

1988

6.3

2009

7.2

2008

5.3

1947

7.7

2004

7.1

2005

7.2

1982

6.1

1970

4.6

1976

7.3

2007

7.2

1990

6.9

2007

4.9

2012

5.4