How many fans would come to the Yankees game in the 1920s?

The New York Yankees played at the Polo Grounds in 1920, and had ahome attendance of 1,289,422. The Polo Grounds was home to the New York Giants, and the Yankees were just tenants. The Yankees were out drawing the Giants in attendance over the next couple of years, and the Giants wanted the Yankees out, forcing the Yankees to build Yankees Stadium.