Chart displays trend lines for the following causes of death:
Intentional, slight trend down from 300 in 2007 to 240 in 2011.
Electrical malfunction, steady at 280 except for a peak of 380 in 2008.
Smoking, significant decline from 480 in 2007 to 300 in 2011
Cause under investigation, steady at 250 until a spike to 350 in 2011
Other unintentional or careless, steady around 400 until slight drop to 350 in 2011.
All numbers are approximate.