1981

5.9

1989

7.5

1981

6.7

2000

7.6

2011

2.0

2007

5.2

1997

5.5

1996

4.8

2003

5.5

2008

5.2

2006

5.2

1997

8.4

1983

5.5

2000

4.2

2020

0.0

1982

5.7

2015

7.7

2013

6.2

1983

6.1

2019

0.0