2010

6.6

1999

7.4

2005

7.3

2005

6.3

2001

5.7

2020

0.0

7.0

2002

6.4

2017

5.1

0.0

2008

6.4

2014

6.9

2007

0.0

1991

5.3

1990

6.2

1975

6.0

2004

7.7

1987

6.5

2014

5.9

2007

4.5