1994

4.5

1989

5.1

2012

9.3

2008

6.1

2011

5.4

1940

7.0

2005

9.7

1948

7.8

1961

7.5

1966

8.0

1970

7.7

1952

6.7

2013

5.8

2002

4.7

2014

6.9

2011

7.4

1995

7.8

1971

7.0

2010

6.6

1955

6.8