We're ahead of Hoffenheim. But yea, it could be a lot more for us, but most Düsseldorf fans are fair weather fans. They only come to the stadium when there's a spectacle to witness. I remember when we were playing against relegation in 2. Bundesliga. The stadium was almost empty. Then when it slowly became clear that we might get promoted, they all came crawling out of their holes.
Clubs like Schalke, Köln etc. have a much better and loyal fanbase, unfortunately.