2016

6.3

2014

6.5

2005

5.9

2005

6.7

2006

5.8

2005

6.2

1998

7.3

2009

7.8

1979

7.6

1970

6.7

1992

7.2

1991

4.2

1988

5.9

1975

0.0

1955

7.0

1982

6.7

1984

5.6

2018

6.8

1948

7.5

1957

0.0