Our new analysis shows that the American middle class lost ground in the vast majority of metropolitan areas from 2000 to 2014, and the shares of adults in the lower- and upper-income ranks rose in most areas. There was more movement into the upper-income tier in about half the areas, while in the other half there was more movement downward.
http://www.consumergenetics.com/caffeine_test.php. The lethal dose of caffeine is 2 grams of caffeine per day, that is, 80-100 cups of coffee a day.For slow metabolizers of caffeine, the lethal dose of caffeine can be lower.t's dependent on weight & individual sensitivity & estimated to be about 150-200 milligrams/kilogram of body mass. ChaCha on! [ Source: http://www.chacha.com/question/what-is-a-lethal-dose-of-caffeine ]. More Answers to  What is a lethal dose of caffeine .
Lethal dose (LD). The dose of radiation expected to cause death to 50 percent of an exposed population within 30 days (LD 50/30).Typically, the LD 50/30 is in the range from 400 to 450 rem (4 to 5 sieverts) received over a very short period.Page Last Reviewed/Updated Thursday, July 23, 2015.ethal dose (LD). The dose of radiation expected to cause death to 50 percent of an exposed population within 30 days (LD 50/30).