2013

6.5

2009

7.6

2002

6.1

2004

0.0

2007

7.9

2000

6.3

1993

7.2

2006

6.2

2006

8.5

1999

8.4

2001

0.0

1994

6.8

1997

6.5

1994

3.0

2012

7.2

1971

6.4

2003

6.5

1993

6.5

2004

7.5

2000

0.0