It already is rounded to the nearest hundredth.
Answer:
The reactor generated the first electricity from nuclear energy on December 20, 1951. Enrico Fermi led a group of scientists in initiating the first self- sustaining nuclear chain reaction. The historic event, which occurred on December 2, 1942, in Chicago.
It has changed over time, but currently it is Mexico and China or India, but if the question is based off past information it is India, China, and Germany.