Data released yesterday by Kryptos Logic reveals that most WannaCry victims are located in China, not Russia. Data is based on the total number of requests made to the main kill-switch domain in the past two weeks. China was by far the most affected country, with 6.2 million requests. The rest of the top 10 is occupied by the US (1.1 million), Russia, India (0.54 million), Taiwan (0375 million), Mexico (03 million), Ukraine (0238 million), Philippines (0231 million), Hong Kong (0192 million), and Brazil (0191 million)
Source: https://www.bleepingcomputer.com/news/security/new-data-shows-most-wannacry-victims-are-from-china-not-russia/