1999

8.5

2020

8.8

2017

7.2

2014

7.7

2019

7.3

2002

6.7

2017

2.0

2005

5.7

1996

5.4

1992

6.4

2003

8.2

1998

10.0

6.4

0.0

0.0

0.0

2007

7.8

2016

0.0

2010

0.0

2017

7.0