Smoking is a leading cause of cancer and death from cancer. It causes cancers of the lung, esophagus, larynx, mouth, throat, kidney, bladder, liver, pancreas, stomach, cervix, colon, and rectum, as well as acute myeloid leukemia (1-3).
Middle Class Income for a Family. The annual average income for a middle class family of four is approximately $70, 354. This is based on a 2006 report by the U.S. Census for a family of four.This figure is in the middle of the range of incomes for this section of the population. The median income during this time for all households was $48,561.n the 2000s, the middle class took a hit. From 2000 to 2010, income levels for those in the middle class decreased by 7 percent. Conversely, the top tier of Americans, those earning over $186,000, saw their incomes rise.
1 Income Range: There are some economists who say that anyone who makes between $25,000 and $100,000 a year is middle class. That might be surprising to some, though.  Median Income: Others take a look at the median annual income, and then go $20,000 to either side. In 2010, the Census Bureau reports that the median income in the United States was $49,445, so if you go a little lower or higher, you get a middle class range of between about $30,000 and $70,000 a year.