In 1656, the first successful iron works in Plymouth Colony was established on the Two Mile River, in what is now part of Raynham. The Taunton Iron Works operated for over 200 years until 1876. It was the first of many iron industries in Taunton. During the 19th century, Taunton became known as the "Silver City", as it was home to many silversmithing operations, including Reed & Barton, F.B. Rogers, and Poole Silver. In the 19th century, Taunton was also the center of an important iron-making industry, utilizing much bog iron from the numerous swamps in the surrounding area. The iron industry in Taunton produced a variety of goods including stoves , tacks  and machinery. One of the more successful companies during this period was the Mason Machine Works, founded by William Mason, which produced machinery for the textile industry, as well as steam locomotives. The Taunton Locomotive Works  also operated in the city during this time. Taunton was also home to several textile mills  and other industries, such as felt  and brick making. During the 19th century, Taunton was a major shipping point for grain from the inland rural farm areas of Massachusetts to the rest of the nation via Weir Village and the Taunton River. With the advent of the railroad, Taunton would also become an important transportation hub due to its central location. The city formed the Taunton Municipal Light Plant  in 1897, when it decided to purchase the floundering Taunton Electric Lighting Company, making it a publicly owned electric utility. Today, TMLP provides electric service to 34,000 customers in Taunton, Berkley, Raynham, and sections of Dighton, Lakeville and Bridgewater. TMLP is governed by a three-member Board of Commissioners, which is elected by the citizens of Taunton.
Question: How many years after Taunton Iron Works was no longer in operation did the City form the Taunton Municipal Light Plant?
Answer: 21