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In 1990, the first CRT with HD resolution, the Sony KW-3600HD, was released to the market. It is considered to be "historical material" by Japan's national museum. [66] [67] The Sony KWP-5500HD, an HD CRT projection TV, was released in 1992. [68] In the mid-1990s, some 160 million CRTs were made per year. [69]