text: This section uses treatment data from the National Database Treatment Monitoring System 
  (NDTMS) to estimate the number of new OCUs annually. The NDTMS captures data on the 
  numbers of people presenting to services with problem drug misuse and information about the 
  drug treatment they receive. All drug treatment agencies in England provide a basic level of 
  information to the NDTMS on their activities each month. The data for this report included all 
  unique individuals presenting to treatment with opiates or crack-cocaine listed as their primary 
  drug between 2005 and 2014. All individuals whose age of first use was listed as below ten or 
  before 2005 were then excluded. Excluding individuals who started using opiates/crack before 
  2005 resulted in a large number of records being left out, due to the fact that the majority of the 
  treatment population, even in 2013/14, initiated in the 1980s and 1990s when heroin and crack 
  use surged in the UK. However, this exclusion is necessary for the incidence methodology, as 
  explained later in this section. The remaining dataset included 52,829 individuals, as shown in 
  Table 10. 