"6"^^ . "7"^^ . . "84"^^ . . "The year 2011 saw a number of significant events in spaceflight, including the retirement of NASA's Space Shuttle after its final flight in July 2011, and the launch of China's first space station module, Tiangong-1, in September. A total of 84 orbital launches were conducted over the course of the year, of which 78 were successful."@en . . . "78"^^ . . "28"^^ . "80" .