1978

6.4

1952

7.6

1963

6.7

2009

7.6

1999

8.4

1957

8.5

2010

7.7

2016

7.6

2014

7.9

2024

6.9

1997

7.9

2015

8.0

1989

8.3

2020

8.1

2012

6.1

1994

8.7

2000

7.4

2008

8.5

2014

8.5

2017

7.3