With the start of work at the station in 1994 and until the end of 2013, the year NASA has spent about 75 billion dollars for the development, construction and operation of the ISS (for meticulous: 43.7 billion was spent directly on the property, and 30.7 billion and 37 Shuttle flights to the station). This does not include the 11.2 billion dollars that went from 1984 to 1993 for the design of the station "freedom" the forerunner of the ISS.
History of the one of the most powerful space agencies from the moment of creating to the modern days
Initially it was thought that the ISS will not just be a research laboratory, but also orbital "plant" and a "launching pad" for other missions. Did not work, partly due to the fact that the complex did not reach the planned size. Instead of the 150 meters, he "grown" only to 109 years, which has resulted in a reduction of its capabilities by 27.6%.