The annual . . . . . . of industrial products has risen enormously in recent years.

The correct answer is output.

• Outbreak is an unexpected event that causes a lot of problems, such as a disease or a war.
• Outcome is the result of something that has happened.
• Outlay is the amount of money that is spent on something.

In the given sentence, the word “output” is the most appropriate word to use because it refers to the amount of something that is produced or manufactured. In this case, the amount of industrial products that are produced has increased significantly in recent years.