In the book, the industries for Districts 5, 6 and 9 are never revealed.
Something I have wondered is how much do the districts know about each other? What if the only time the districts get to see and learn about each other is during the victory tour broadcasts?
If that is the case, could that mean District 5, 6 and 9 never won a Hunger Games during Katniss's lifespan? If none of those districts won, Katniss might not think or know about what they do, which is why so little is revealed in the book.
It would make sense because with the exception of Foxface, none of the tributes from those districts did well in the games. It would not be hard to believe that none of those districts won since at least the 61st Hunger Games, as three years old would be about the time Katniss would be old enough to start forming memories of the games.
What are your thoughts? Do you think District 5, 6 or 9 could have won a game in the last decade of the Hunger Games? If not, who do you think won during Katniss's life?