Which year did disney introduce toy story mania?

The available information references the character Sheriff Woody and the creation team behind the Toy Story franchise, but it does not mention a specific year when Disney introduced the term "Toy Story mania" or when a marketing push for the franchise began. The only dates cited relate to the film releases—Toy Story in 1995, Toy Story 2 in 1999, and Toy Story 3 in 2010—yet none of these are labeled as the start of a mania. Therefore, based on the evidence at hand, no definitive year can be identified for the introduction of Toy Story mania. If you need a broader context on the franchise's timeline, the films were released in the mid‑1990s through the early 2010s, with the franchise becoming a cultural phenomenon after each release.