50.6 Million Immigrants alone in the US make more than 15% of the total population which represents the attractiveness and Pull Factors of the United States and at the same time e declining birth rate and demand for workers. Also a huge amount of immigrants are in these Countries: Germany the richest country in Europe with almost 16 Million immigrants with only a total population of 80 Million. And Saudi Arabia, Russia and the UK all have a large amount of immigrants. In our statistic of countri