1957

6.4

1984

5.6

2000

4.7

1941

5.8

1999

5.7

2008

6.6

1994

5.9

0.0

2010

6.4

1971

6.6

2006

5.7

2007

0.0

2004

6.2

1972

6.2

1989

2.7

1940

6.4

1955

6.1

1947

6.3

1948

5.6

2005

5.1