2000

7.5

2007

2.2

2016

3.5

1998

8.2

1994

7.8

1979

6.7

2007

6.5

2012

5.8

0.0

2009

3.4

2014

2.0

2002

8.1

1999

0.0

2010

3.4

2015

2.5