1997

6.5

1998

8.2

1994

7.2

2004

7.9

2006

8.2

2018

6.7

2016

0.0

2013

6.0

2006

4.1

1992

7.5

2016

4.3

0.0

1999

7.7

2000

6.8

2000

6.9

2001

6.8

2016

8.2