From a study by the Community Service Society of New York:

Roughly 17 percent of young Puerto Rican men were not in school, employed or looking for work, compared with 9 percent of Dominicans and 8 percent of Mexicans. Of those Latinos born in the United States, only 55 percent of Puerto Rican youth were enrolled in school, compared with 68 percent of Dominicans and 67 percent of Mexicans. Regardless of birthplace, about 33 percent of Puerto Rican families lived below the poverty line, compared with 29 percent of Dominicans and 27 percent of Mexicans. [NYT]

Elsewhere in the study:

• Latino youth are largely English-speaking. Most Latino youth were born in New York City, and an overwhelming share (85 percent) speaks English well or very well. Among large Latino groups, only Mexicans, who are just 13 percent of the city’s Latino youth population, have a high share of immigrants and a low share of English speakers.
• A greater percentage of Latino youth live in poor and near-poor households than any other racial group. Fifty-six percent of Latino young people live in households with incomes less than 200 percent of the Federal Poverty Level (FPL).
• As an overall share of the entire population, Hispanics are the second-largest racial/ethnic group in New York City.  With 2,290,007 individuals, they make up 27.6 percent of the entire city population, second behind whites, who are the largest racial group at 35.6 percent.