These numbers were on the title card at the very end of July 13th 2013 episode (when the show was temporarily cancelled)
243 addicts were filmed.
238 went to treatment.
156 are sober today.
That means 64% of addicts on the show were sober as of July 2013.
26 addicts (that we know of) have died since their intervention, as of October 2017.
25 of those 26 addicts went to treatment (Sean did not).
The 5 addicts who did not go to treatment: Alissa, Marquel, Larry, Adam, Sean.
For more discussion about this topic, read this post.
Note: None of the above includes subjects of Intervention Canada.