Calculate Nigeria's annual per capita electricity consumption in kWh, given a total grid generation of 32 TWh/year and a population of 200 million people.

Given grid generation = $32 \text{ TWh/year}$.
We know that $1 \text{ TWh} = 10^9 \text{ kWh}$.

$$\text{Total grid generation} = 32 \text{ TWh} \times \frac{10^9 \text{ kWh}}{1 \text{ TWh}} = 32 \times 10^9 \text{ kWh/year}$$

Per capita consumption is calculated by dividing the total grid generation by the population.
Given population = 200 million = $200 \times 10^6$ people.

$$\text{Per capita consumption} = \frac{\text{Total grid generation}}{\text{Population}}$$ $$\text{Per capita consumption} = \frac{32 \times 10^9 \text{ kWh/year}}{200 \times 10^6 \text{ people}}$$ $$\text{Per capita consumption} = \frac{32 \times 10^3 \text{ kWh/year}}{200 \text{ people}}$$ $$\text{Per capita consumption} = \frac{32000 \text{ kWh/year}}{200 \text{ people}}$$ $$\text{Per capita consumption} = 160 \text{ kWh/person/year}$$

Nigeria's annual per capita electricity consumption is $\text{160 kWh}$.