Given the question: Extract the answer to the following question from the movie plot. If the question isn't answerable, please output "Can't answer". Question: How many changes has U.S. Congress made to tax code? Title: An Inconvenient Tax Movie plot: An Inconvenient Tax sheds light on one of Americas messiest problems a fundamentally broken tax code that affects every part of people's lives. With the U.S. Congress making over 16,000 changes to the tax code in the last two decades alone, many Americans want something better, but few know where to start. This feature-length documentary film reveals the many ways Congress uses the tax code to achieve political goals that have nothing to do with raising revenue. It also tackles the controversial issue of tax reform through a non-partisan presentation of U.S. tax history and current proposals to fix the code. In a time when America faces fiscal crisis, An Inconvenient Tax brings a crucial exploration of the tax code to the big screen.- Written by Life Is My Movie Entertainment
The answer is:
16,000