(A) The number of visitors to the Ueno Zoo in Tokyo, the oldest of Japan's 100 zoos, rose steadily from the 1880s to the 1980s, peaking in 1974 at more than 7 million per year. ... This is the biggest challenge of creating a better zoo today.
――東京経済大学 経済学部経済学科(2月11日実施)――2005年