Great tool!
First: Are these constant dollars? Or nominal dollars? Maybe there should be a toggle?
Second: I suggest you extend the historical time horizon by a decade, as it will help to demonstrate how Prop. 98 and the insane rise of K-12 spending have totally fucked our budget.
Now it looks like Medi-Cal, services for intellectually disabled people, and "Other HHS programs" will fuck our budget even harder in the coming decade.
Finally: I suggest adding per-beneficiary metrics for all services, where possible. How has the K-12 spending per pupil changed? How will developmental services spending per disabled person change? How much has Medi-Care spending risen per enrolled person?