1993

8.1

2007

6.7

2017

7.9

2019

8.5

1954

8.4

1985

8.3

1979

8.2

2004

7.5

1957

8.5

2019

8.1

1997

7.9

2018

7.6

2009

7.7

2019

7.7

2001

7.6

2004

8.4

2016

7.6

1960

8.4

1990

7.4

1999

8.4