CREATE TABLE table_11456251_5 (_percentage_of_total_capacity VARCHAR, annual_energy__billion_kwh_ VARCHAR)

What is the percentage of total capacity when the energy is 120.2?
SELECT _percentage_of_total_capacity FROM table_11456251_5 WHERE annual_energy__billion_kwh_ = "120.2"
SELECT "_percentage_of_total_capacity" FROM "table_11456251_5" WHERE "120.2" = "annual_energy__billion_kwh_"