Fig. 2From: The impact of Taiwan’s implementation of a nationwide harm reduction program in 2006 on the use of various illicit drugs: trend analysis of first-time offenders from 2001 to 2017Yearly age-standardized first-time offense rate from 2001 to 2017 in Taiwan with the most parsimonious model in segmented regression analysis that had an intervention in 2006 for a heroin, with a three-parameter model; b methamphetamine, with a two-parameter model; and c ecstasy, with a two-parameter modelBack to article page