In order to estimate our model parameters, we used data from multiple sources. For yearly population, we used US Census data for the resident population of the US. \cite{census2017} For opioid data, we used data from the Centers for Disease Control and Prevention (CDC). This data includes opioid-related drug overdose death data for 1999 to 2014, as well as data for the number of opioid prescriptions between 2006 and 2016. For additional prescription data before 2006, we referenced \cite{Kenan2012} which provides data from 2000. Because we were more interested in understanding the fraction of the population prescribed opioids, rather than the number of prescriptions, we had to connect these rates in some way. To do this we referenced a recent CDC report \cite{prevention2017} that estimates the number of prescriptions per person as between 3.5 and 3.7. This data can be seen in Figure \ref{604037}.