1920

6.2

1993

6.3

2019

6.4

1988

5.2

1965

7.6

2006

5.0

2014

5.4

1988

6.7

1963

7.3

2003

5.6

2002

6.0

2008

7.1

1967

5.5

2012

7.1

2013

7.5

2012

6.4

2010

7.1

1974

6.7

2000

6.2

1984

6.6