Hi Suziequeue
As a vet, let me help!
The exact cut off values for being significant depend on the lab themselves, but basically the method for working out eggs per gram involves multiplying, so if no eggs are seen, there are less than 50 eggs per gram of faeces.
Thereafter, any eggs seen give you a number of eggs per gram.
Our cut off value for being a significant problem is usually 2-300, so as most of these are under this number, it is probably fine not to worm them now, (the less often you can get away with worming = less chance of getting resistance) unless your number 1009 looks thin, scoury or just 'wormy'.
Hope that helps.
Suzanne