1958

7.6

1966

6.5

1947

7.3

1988

6.3

1984

7.2

2000

6.0

1979

6.1

2010

6.1

2012

6.6

1948

7.9

1940

7.1

2015

5.7

2002

6.7

1987

5.7

2016

7.0

1997

6.0

2014

6.2

2018

6.0

2014

7.6

1939

7.1