New York is the most important source of political fundraising in the United States, as four of the top five ZIP codes in the nation for political contributions are in <answer>Manhattan</answer>. The top ZIP code, 10021 on the Upper East Side, generated the most money for the 2004 presidential campaigns of George W. Bush and John Kerry. The city has a strong imbalance of payments with the national and state governments. It receives 83 cents in services for every $1 it sends to the federal government in taxes (or annually sends $11.4 billion more than it receives back). The city also sends an additional $11 billion more each year to the state of New York than it receives back.
Four-fifths of the ZIP codes that provide the highest amount of political contributions in the United States are located in what borough?
Manhattan