1981

4.0

1993

6.9

2004

5.8

2014

7.8

2015

6.2

2008

5.9

2009

0.0

2008

5.0

2005

5.3

1995

5.7

2004

6.1

1996

6.8

1948

4.7

1930

0.0

1958

7.0

2002

5.5

1995

6.4

1950

0.0

1930

5.5

2007

0.0