The office of Illinois' attorney general says it generated more than $1.1 billion in state revenue through litigation and collection efforts in 2012.

Of that amount, more than half came from collections litigation, including funds from child support, damage to state property, unpaid educational loans, fines and penalties. The rest was split between tobacco litigation and estate tax revenues.

In a Sunday news release, officials say it was the largest annual amount collected in nearly a decade. The sum doesn't include millions of dollars the office recovered through mediation and litigation. Those funds are usually given as restitution to the parties involved.

Officials estimate they generated more than $36 for every tax dollar they spent in 2012.

Collections under the Attorney General Lisa Madigan have reached more than $9.9 billion.