Here's why:
* Different organizations: Each country and region has its own guide dog training organizations, each maintaining their own records.
* Varying definitions: What constitutes a "registered guide dog" can differ slightly, depending on the organization and local regulations.
* Data collection challenges: Not all organizations publicly share their numbers, and some may not track them meticulously.
However, we can give you some general estimates:
* The United States: It's estimated that there are around 10,000 to 15,000 registered guide dogs in the U.S.
* The United Kingdom: The UK has a relatively high density of guide dog users, with around 7,000 to 8,000 registered guide dogs.
* Globally: While difficult to quantify, it's likely that the number of registered guide dogs worldwide is in the tens of thousands.
Keep in mind that these are rough estimations, and the actual number could be higher or lower.