2008

6.3

1981

6.4

1972

6.5

2001

5.1

2003

6.1

1971

4.8

2002

5.2

1976

3.0

2013

4.0

1972

2.5

2005

5.6

1994

1.0

2009

0.0

1974

3.0

2004

5.3

2007

3.8

2004

5.7

2007

4.8

1984

5.7

2013

0.0