2000

7.4

2008

5.3

2017

6.7

1981

8.5

2015

0.0

2002

6.4

2013

5.0

2010

4.5

1993

0.0

2004

3.8

2003

6.5

1992

4.9

2008

6.8

1991

5.6

2009

5.3

1994

7.3

2008

5.4

2011

3.4

1999

5.4

2016

2.9