How many immigrants fueled labor needs in the u. s. between 1870 and 1915?

More than 15 million immigrants fueled labor needs in the U.S. between 1870 and 1915

Explanation:

the effect of the ming leaders banning ships with more than two masts was that there was no further construction of ships masts, because there was a surplus. ming emperors disallowed foreign exploration

the graphs indicate that few people in bolivia work in industry, as that is the least expressive sector shown in the respective graphic.