Did migration change in the 20th century compared to the 19th century?

The biggest change was undoubtedly towards the end of the 20th century when moving between countries had finally become effortless, and immigration policies set in place were airing their faults. According to census data in the United States, "by 1998, immigrants accounted for 9.8 percent of the United States population, compared with 4.8 percent in 1970." This data proves that even in the space of 30 years, the United States saw an incredibly change in their migration figures, with millions of people moving to the country from all over the world. Many would argue that migration has always had a similar pattern but it's only recently it's become so widely noticed. Migration has always occurred, but it's now occurring in such vast numbers and resources are being stretched that it's becoming a concern and that is, again, partly due to the ease of migration. Nowadays, every country is a visa and a plane journey away which, for an increasingly educated and consequently skilled population, means it's becoming easier to migrate.