1999

5.9

1971

6.0

1986

6.2

1967

6.6

1988

5.7

1988

6.2

2008

6.5

2003

5.7

1987

6.3

2016

6.2

2014

6.2

2015

6.5

1993

6.2

2009

6.7

2015

6.7

2014

6.1

2018

7.1

2017

6.4

2003

6.5

2015

5.9