Debunking the drinking age argument

Last week someone claimed that the increase in the drinking or purchase age in 1999 lead to more young people dying, and killing themselves. I do not have access to the long-term suicide stats, but do have the long-term youth mortality states (and suicide is the leading cause).

As one can see, the youth mortality rate has continued to drop since the late 1990s. Those advocating to raise the age seem to want to blame everything from climate change to youth suicide on it.