Final answer:
Norway is the country where 99 percent of its total energy requirement is obtained by hydro-power.
Step-by-step explanation:
The country in which 99 percent of its total energy requirement is obtained by hydro-power is Norway. Although countries like New Zealand, Switzerland, and Brazil use hydro-power, none of them reaches the 99 percent mark. New Zealand, for example, meets about two-thirds of its electricity demand through hydroelectric power, which is significant but not as high as Norway.