2020

7.8

2017

6.7

2000

7.4

2002

6.3

2008

4.7

2004

3.8

2013

5.0

1989

6.0

1999

5.4

2015

0.0

1992

4.9

1981

8.5

2016

3.5

2010

4.5

1991

5.6

2008

6.8

2003

6.5

2004

6.4

1994

7.3

2019

0.0