Who knows how many of those tubes are loaded and operable in 2005? Who knows if the NK C&C is still intact, that is, would generals pass down the nationally suicidal "Gotterdamerung" order if Kim Jong Il decided to go out in a blaze of glory with a mass attack on Seoul?
The current word from defectors and intel is that 85-100% of them are still operable. It is apparently a capital offense in the NK Army to let your artillery piece to be inoperable outside of maintenance times.
That, their nuclear and missile programs, and the rest of their army is where all the money they have that Mentally Il doesn't appropriate goes.