What are the similarities or differences between the foreign-born population who came into the U. S. before 1970 and 1990?

More of the foreign-born population is choosing to become naturalized citizens.

The number of foreign-born population who became naturalized citizens has declined by about 65 percent.

The number of foreign-born population who choose to become naturalized citizens has remained steady since the 1970s.

The number of foreign-born population who choose to become naturalized citizens has risen steadily since the 1970s.