When did Dora stop airing?

Can you tell me when exactly did the popular TV show Dora the Explorer cease its broadcast? I remember watching it religiously as a child and I'm curious to know when it stopped airing. Did it end naturally due to low ratings, or was there a specific reason behind the cancellation? I'm particularly interested in the timeline, as I'd like to revisit my childhood memories by watching the show's finale, if it exists.