Over the past 20 years in the United States, nuclear power production?

What about it?

http://www.en.wikipedia.org/wiki/Nuclear_power_in_the_United_States

http://www.energyinformative.org/nuclear-energy-pros-and-cons

To determine the changes in nuclear power production in the United States over the past 20 years, you would need to gather historical data on nuclear energy generation during that period. Here are the steps you can follow to find this information:

1. Start by researching reliable sources of energy information. This can include government agencies, industry reports, and research institutions. A good place to start is the U.S. Energy Information Administration (EIA) website (eia.gov), which provides comprehensive data on energy production, consumption, and trends.

2. Once on the EIA website, navigate to the "Electricity" section, where you can find data related to various energy sources, including nuclear power.

3. Look for specific reports or articles on nuclear power production in the United States. These reports often include historical data, trends, and projections for future years.

4. Some useful reports to look for on the EIA website include the Annual Energy Outlook, Monthly Energy Review, and Nuclear Energy data sets. These reports usually provide information on nuclear capacity, generation, and any significant changes or trends over time.

5. Access and analyze the data provided in these reports. Look for specific information on nuclear power production levels over the past 20 years. This can include total generation, capacity factors, and any notable events or policy changes that may have affected production.

6. Consider comparing the data over time by creating visualizations or graphs to better understand the changes in nuclear power production. This can help identify any patterns, fluctuations, or long-term trends.

By following these steps, you should be able to find reliable data on nuclear power production in the United States over the past 20 years and gain a better understanding of the changes that have occurred.