1990

5.7

2007

6.7

1988

4.0

2016

3.4

2007

6.6

2002

6.6

2004

6.4

2005

5.9

1985

7.0

2012

10.0

1999

6.7

2014

5.5

2008

7.4

1980

6.3

2018

0.0

2017

6.3

2017

0.0

2002

5.8

1989

6.6

2003

5.5