1998

6.0

2006

6.1

1993

5.5

1970

6.0

2016

6.7

1973

7.3

2010

7.4

1940

6.3

2014

6.2

2006

6.0

1998

6.0

1980

6.7

2019

6.5

2015

5.1

1980

5.9

2017

6.1

2016

5.6

2003

6.8

1960

7.5

1994

6.2