Currently my subscriber ratio is 1115 views per subscriber (or 0.0008963888 subscribers per view), and it tends to increase (decrease), which I see as a good trend. It is this way because many people watch my videos, without being subscribers, but getting referred from suggested videos, search engines, YouTube home page and embedded on forums (according to Analytics). Plus I don't really do in every video annotations for subscribers, voiceover asking for subs, end screen with asking to subscribe or similar tactics employed by almost every popular YouTube channel, because I don't see the subscriber count as some kind of channel karma, even if it helps being with higher subscriber base (in presentations, getting verified badge, for ego etc).