1997

7.3

2017

7.7

2019

8.5

1954

8.4

1985

8.3

1957

8.5

2018

7.6

2019

7.7

1999

8.4

2018

7.4

2016

7.6

1997

7.9

1994

8.7

2004

7.5

2019

8.1

1990

7.4

2019

8.2

1979

8.2

1960

8.4

1977

8.2