1944

6.0

2009

5.4

2008

4.4

2014

5.9

1972

6.2

1976

8.0

2016

3.8

1968

6.1

1980

4.8

2000

4.3

2005

7.8

1995

5.3

1989

7.1

2010

7.5

2016

7.2

2016

6.6

2004

5.5

2016

5.9

1968

7.4

2006

5.2