1958

3.5

2008

6.4

1983

6.2

2011

5.2

2008

0.0

2012

6.8

2006

6.5

1991

6.0

1988

6.0

1955

7.4

2009

7.9

2010

0.0

1956

5.3

2010

2.0

1918

5.1

2005

8.0

1943

0.0

1990

6.5

2012

8.0

2015

6.5