A suburban lifestyle is typically family-oriented, with good access to schools, parks, and shopping centers. It promotes an active community life through sports leagues, homeowners associations, and local festivals. As the population continues to grow and the area becomes more developed, it is likely that the ZIP code will see an increase in amenities and services catering to the growing suburban population.

It is important to note that while the population density has increased, it has not yet reached the levels typically associated with urban areas (3,000 to 10,000 people per square mile). This suggests that the ZIP code still maintains some of its suburban rural character, even as it becomes more suburbanized.

In conclusion, the historical population data for ZIP code 21704 in Urbana, Maryland, indicates a gradual shift from a suburban rural lifestyle to a more suburban one over the past decade. As the population continues to grow and urban development progresses, the area is likely to see an increase in amenities and services that cater to the growing suburban population while still maintaining some of its original character.