France generates the greatest share of its electricity from nuclear power among the listed countries, accounting for roughly two-thirds to about 70% of its electricity in recent years.

Key context:

• France is widely recognized for its nuclear-intensive energy mix, with estimates commonly cited around 64%–70% of national electricity coming from nuclear power depending on year and methodology.

• Other major economies (Russia, USA, China) rely far less on nuclear as a share of total electricity, typically in the single digits to low double digits for China, and around 20% for the USA and Russia in various periods.

Answer: France. It has the highest share of its electricity generated from nuclear power among the options, typically around 70% in recent figures.