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 .
200mg of caffeine is equivalent to about: 2.6 shots of espresso; 2.5 8 fl.oz. Red Bulls; One 5 Hour Energy Shot.5 of a Starbucks Venti Brewed Coffee; 1.25 16 fl.oz. Monster energy drinks; 6 12 fl.oz. Cokes; Those Ultra-Sensitive to Caffeine. For those ultra-sensitive to caffeine it is hard to determine an exact caffeine safe limit. Some people can have one cup of coffee (100mg-120mg) in the morning and still fail to get to sleep that evening.