1987

5.2

1995

5.6

1988

6.2

2005

5.2

1989

5.5

1954

6.7

1988

6.5

2008

5.8

2003

6.8

2017

6.6

1993

6.6

1949

7.5

2006

6.7

2014

5.5

1993

6.5

2001

6.4

1996

6.5

2017

6.5

1979

6.1

1988

6.4