2015

3.2

1969

6.5

1961

6.5

1977

6.9

2007

6.2

1946

7.3

2008

6.3

1973

6.8

1970

6.8

1936

0.0

2008

7.8

2002

5.9

2000

7.1

2005

6.4

1923

0.0

2014

7.3

2018

8.1

2006

6.7

2004

7.0

2009

7.5