1984

7.2

1979

8.1

2019

8.1

2016

7.0

2013

7.2

1954

8.0

2002

6.5

2015

5.3

2018

6.8

2013

6.8

2010

7.1

1970

6.9

1993

6.6

1985

7.2

2016

7.4

2012

6.2

1946

7.6

1972

7.1

2014

8.5

2015

6.7