Final answer:
The exact percentage of Miami's population in 1990 that was represented by immigrants is not provided in the information given. However, Miami has historically been a significant hub for immigrants, suggesting a substantial portion of the population was likely comprised of immigrants.
Step-by-step explanation:
The question about the percentage of Miami's population represented by immigrants in 1990 requires an understanding of historical immigration patterns and demographics. Based on the information provided, while specific data for Miami in 1990 is not included, it is clear that the immigrant population has been a significant and growing portion of the U.S. overall, and Miami has been a major hub for immigrants, especially from Latin American countries.
Unfortunately, without specific statistical data for Miami's immigrant population in 1990, we cannot provide an exact percentage. However, it's important to note that by 2005, immigrants comprised 14.7 percent of the U.S. workforce, and Hispanics grew from less than five percent of the U.S. population in 1970 to about 16 percent by 2010, with many choosing to live in Miami. This highlights the significant presence of immigrants in areas like Miami during the period in question.
Given Miami's proximity to Latin America and its status as a focal point for Cuban immigration, especially after Castro's policy changes, it's reasonable to infer that the percentage of immigrants in Miami in 1990 was likely substantial and possibly higher than the national average at the time.