It seems to me that the trend is quite clearly more drugs coming on to the market, if the 'war' was working you'd expect fewer not more. I know these are only supply figures but I think they indicate that if people want to take drugs then they will.
The problem here though is that there are 57 new substances that people will be taking where the effects on their bodies (particularly long term) are probably unknown. If we had a legalised, regulated drugs market then the quality of the substances could be ensured, protecting the public from unnecessary harm whilst also educating them on the dangers of their chosen drug. I despair at the people who still believe this war is working and isn't, like all wars, just creating unnecessary suffering.