на другом форуме американцы подбросили, вспомнил. Хотя Профа и нет уже тут
короче писец приходит там среднему классу. Вот наиболее популярные профессии в 2012 и их зарплаты.
http://finance.yahoo.com/news/wages-stink-americas-most-common-095900890.html
а также

Workers in seven of the 10 largest occupations typically earn less than $30,000 a year, according to new data published Friday by the Bureau of Labor Statistics. That's a far cry from the nation's average annual pay of $45,790.
...
Middle-class Americans have been losing ground, as median household income dropped by more than $4,000 since 2000.
Part of this decline stems from a disappearance of middle-class jobs and an explosion of lower-paying ones. Some 58% of the jobs created during the recovery have been low-wage positions