2005

6.1

2009

3.3

1996

6.5

1985

6.2

2003

5.8

2008

6.7

1977

5.6

2002

3.4

1997

5.9

2015

6.2

2014

6.9

2006

6.3

2004

0.0

2014

3.4

1985

6.6

2013

10.0

1997

6.2

1974

4.7

1977

6.0

2013

6.5