The median income has shown an upward trend, increasing from $47,802 in 2013 to $97,869 in 2022. This increase suggests significant economic growth in the community. The peak of racial diversity coincided with the highest median income figures, exceeding $100,000 in 2021.

The population has fluctuated over the years, ranging from a low of 506 in 2014 to a high of 660 in 2022. Recent population growth coupled with rising incomes might indicate increased attractiveness of the area.

The lack of diversity in this zip code contrasts with national trends towards increasing diversity in many areas of the United States. The rapid income growth outpaces national averages, suggesting strong economic development over the past decade.

The persistence of low diversity despite significant economic growth is noteworthy. In many areas, economic growth often correlates with increasing diversity. The fact that this hasn't occurred in West Lebanon could be due to various factors such as its rural location, local industry composition, or cultural factors.

Zip code 47991 represents a community that has maintained demographic homogeneity while experiencing substantial economic growth. This presents a case study in how economic prosperity can occur without necessarily leading to increased racial diversity in the short to medium term.