Illustrative example of determining cohorts of LAPM users. Impact 2 creates a matrix such as the one above for each LAPM used by a client of the organisation. Each row represents the cohort that corresponds to the year in which the method was delivered. For example, 'a' denotes the cohort provided contraceptive services in 1999. This cohort 'a' is shown in subsequent years to represent the users' continuation with their LAPM in future years. To estimate the total number of LAPM users of a long-acting and permanent method in any given year, the numbers associated with the column of the year of interest are totalled, as shown by the pink box surrounding the cohorts listed in 2005. In actuality, the model accounts for cohorts starting from services provided in 1982 to capture all continuation of LAPMs from 2001 (the first year of analysis included in the model) onwards.