1976

6.9

1952

7.4

1973

6.1

1997

9.0

2016

6.5

2017

2.0

1978

6.8

1944

3.9

1996

4.4

2005

6.3

1994

5.0

2013

5.0

2006

7.4

1985

7.8

2006

7.5

2004

6.6

2005

6.9

2005

6.8

2009

2.0

1981

7.2