45–64. The ratio of college-aged and elderly residents was lower, at 12% and 8% respectively. Similarly, most inhabitants of Community District 7 are youth and middle-aged adults: 26% are between the ages of between 0–17, 31% between 25–44, and 23% between 45–64. The ratio of college-aged and elderly residents was lower, at 11% and 9% respectively. As of 2017, the median household income in Community District 5 was $30,166, and the median household income in Community District 7 was $35,355. In 2018, an estimated 34% of Fordham South residents lived in poverty, compared to 25% in all of the Bronx and 20% in all of New York City. One in eight residents (13%) were unemployed, compared to 13% in the Bronx and 9% in New York City. Rent burden, or the percentage of residents who have difficulty paying their rent, is 65% in Fordham South, compared to the boroughwide and citywide rates of 58% and 51% respectively. In 2018, an estimated 26% of Fordham North residents lived in poverty, compared to 25% in all of the Bronx and 20% in all of New York City. One in seven residents (14%) were unemployed, compared to 13% in the Bronx and 9% in New York City. Rent burden, or the percentage of residents who have difficulty paying their rent, is 61% in Fordham North, compared to the boroughwide and citywide rates of 58% and 51% respectively. Based on this calculation, , both areas are considered low-income relative to the rest of the city and not gentrifying. Land use and terrain Fordham is dominated by 5- and 6-story apartment buildings, often set flush to the sidewalk. Many of the apartments on the Grand Concourse are taller. The New York Botanical Garden and the Wildlife Conservation Society's Bronx Zoo, both inside Bronx Park, collectively occupy dozens of acres of land within the neighborhood. Fordham University maintains its historic original campus on much of the former Rose Hill Manor in the center of the neighborhood. It is one of the largest "green" campuses in New York City, and its traditional collegiate gothic architecture often serves as a backdrop for television and film productions. The Fordham Road Business Improvement District operates on the northern border of the neighborhood. This retail district is the longest in the Bronx. Fordham is split into two community districts: Community District 5 south of Fordham Road and Community District 7 north