1990

5.6

2017

0.0

2018

5.0

1999

6.4

2004

6.8

2002

0.0

2006

5.9

1980

5.4

2008

3.0

2007

5.6

2007

3.8

2013

7.0

2008

6.5

1980

6.8

2014

4.0

1984

5.7

1976

7.2

1978

6.1

2000

6.0

2007

7.0