1987

5.7

2003

5.6

1993

5.5

2008

6.5

2003

6.6

2006

6.5

2016

0.0

2004

5.3

1998

8.1

0.0

2011

7.2

2015

0.0

1979

6.7

2014

7.1

1994

4.0

2017

5.5

2016

6.2

2021

5.7

2018

6.4

2014

0.0