Since the 2006 all-time peak mail volume, after which Congress passed the Postal Accountability and Enhancement Act ", (which mandated $5.5 billion per year to be paid into an account to pre-fund retiree health-care, 75 years into the future, a requirement unique among organizations and businesses in the U.S.), revenue dropped sharply due to recession-influenced declining mail volume, prompting the postal service to look to other sources of revenue while cutting costs to reduce its budget deficit.