Q:Given the following passage  "Mass transit in New York City, most of which runs 24 hours a day, accounts for one in every three users of mass transit in the United States, and two-thirds of the nation's rail riders live in the New York City Metropolitan Area.",  answer the following question. Note that the answer is present within the text.  Question: For which kind of public transportation does New York have 66% of the users?
A:
rail