Addiction - How many chippers are there?

[newgrower]

Swim was wondering how many people who use heroin eventually get addicted. There are those who can control their usage but swim wanted to know how many users can. He thought that our own unscientific poll might be interesting. He himself was addicted but has stopped.

Generally addiction should be considered extended daily use but may be open to other interpretations. Chipping should be consider regular/irregular use that doesn't lead to physical dependence but there may also be some variability in definition.

[chinpokomaster]

SWIM has been chipping for about 5 months now. He uses his stuff every day until it runs out but will go at least a week before buying again. No physical side-effects.