2004

0.0

2009

6.6

1997

5.4

1977

6.3

1996

7.8

2005

5.2

2002

6.4

2007

6.0

2004

0.0

2008

5.0

2015

6.4

2012

6.2

1999

0.0

2003

0.0

2001

4.3

1978

5.5

1997

3.2