1985

8.0

2009

6.6

1948

6.5

1977

4.3

1997

6.4

2004

6.9

2005

6.1

2010

6.2

1968

0.0

1974

5.8

1947

6.7

2009

6.0

2013

6.2

2009

7.3

1958

5.7

1955

6.0

2007

6.8

2017

6.0

1985

7.1

1970

6.8