1988

6.3

1966

6.2

1993

6.6

1959

6.1

1997

6.1

1994

6.6

2006

6.1

2017

6.5

1988

6.3

1949

6.2

2013

6.5

2016

6.1

1980

6.9

1990

6.0

2007

6.4

1985

6.5

2006

6.9

1993

6.5

2017

6.9

1895

5.5