sporting areas, as well as 21 playgrounds and a road from which automobile traffic is banned. While much of the park looks natural, it is almost entirely landscaped, and the construction of Central Park in the 1850s was one of the era's most massive public works projects, with some 20,000 workers crafting the topography to create the English-style pastoral landscape Olmsted and Vaux sought to create. The remaining 70% of Manhattan's parkland includes 204 playgrounds, 251 Greenstreets, 371 basketball courts, and many other amenities. The next-largest park in Manhattan is the Hudson River Park, stretches on the Hudson River and comprises . Other major parks include: Bowling Green Bryant Park City Hall Park DeWitt Clinton Park East River Greenway Fort Tryon Park Fort Washington Park Harlem River Park Holcombe Rucker Park Imagination Playground Inwood Hill Park Isham Park J. Hood Wright Park Jackie Robinson Park Madison Square Park Marcus Garvey Park Morningside Park Randall's Island Park Riverside Park Sara D. Roosevelt Park Seward Park St. Nicholas Park Stuyvesant Square The Battery The High Line Thomas Jefferson Park Tompkins Square Park Union Square Park Washington Square Park Economy Manhattan is the economic engine of New York City, with its 2.3 million workers in 2007 drawn from the entire New York metropolitan area accounting for almost two-thirds of all jobs in New York City. In the first quarter of 2014, the average weekly wage in Manhattan (New York County) was $2,749, representing the highest total among large counties in the United States. Manhattan's workforce is overwhelmingly focused on white collar professions, with manufacturing nearly extinct. Manhattan also has the highest per capita income of any county in the United States. In 2010, Manhattan's daytime population was swelling to 3.94 million, with commuters adding a net 1.48 million people to the population, along with visitors, tourists, and commuting students. The commuter influx of 1.61 million workers coming into Manhattan was the largest of any county or city in the country, and was more than triple the 480,000 commuters who headed into second-ranked Washington, D.C. Financial sector Manhattan's most important economic sector lies in its role as the headquarters for the U.S. financial industry, metonymously known as Wall Street. Lower Manhattan is home to the New York Stock Exchange (NYSE), at 11 Wall Street, and the Nasdaq, at 165 Broadway, representing the world's largest and second largest stock exchanges, respectively, when measured both by