2009

5.3

1973

4.4

2008

4.9

1977

4.9

1993

7.1

1974

5.7

2009

6.0

1977

5.2

2005

5.3

2013

4.6

3.5

2006

4.2

1931

6.0

1984

0.0

2003

6.2

1981

5.4

1997

5.0

1981

5.9

1980

4.0

1985

6.5