2020

7.8

2017

6.7

2008

5.3

1981

8.5

2002

6.3

2000

7.4

2003

6.5

2013

5.0

1993

0.0

1999

5.4

2008

6.8

2016

2.9

2015

0.0

2010

4.5

1992

4.9

1989

6.0

2004

3.8

2016

6.5

2013

4.8

2017

0.0