2003

6.2

1989

7.7

1970

6.4

2008

5.8

2014

0.0

2002

6.4

2006

5.1

1985

6.6

2000

4.9

2002

6.5

1999

6.8

1971

6.2

2009

6.6

2005

6.2

1993

6.6

1997

5.5

2007

6.2

2002

5.4

2004

6.0

2007

6.9