2003

8.2

1999

6.8

1985

7.7

2001

6.4

1992

7.4

1999

7.1

2014

4.7

1975

4.0

2001

5.9

2004

6.3

2006

6.6

2014

0.0

2000

5.7

2007

5.6

2005

7.2

1992

7.0

1994

7.3

2006

6.8

2004

4.6

2008

5.2