Another wave of migration came in the 1940s and 1950s.

In the late 1960s, however, several waves of migration started.

The first large wave of migration to Chicago came in the late 1940s.

Another wave of migration from Chicago began in the 1990s.

In the 1930s and 40s, there was a second wave of migration.

The second wave of migration began in the late 1990s and continues today.

This produced a wave of migration to Israel in the early 1990s.

Both our nations have been formed in part by waves of migration.

The wave of migration continued substantially into the 18th century.

The modern wave of migration from China only dates back to the early 1990s.