Figures for the number of people receiving treatment for opiate problems for the years requested are in the table below.
Numbers of opiate users in treatment 2011-12 to 2013-14
Opiates and crack
Source: National Drug Treatment Monitoring System (NDTMS)
The most recent drug prevalence estimates suggest that there were 256,153 opiate users in England in 2011-12, and 159,542 of these (62%) received treatment in the same year. There are no prevalence estimates for 2012-13 and 2013-14, so equivalent proportions are not available for these years.