The IRS released it 2012 Data Book, which summarizes agency activity for fiscal year 2012 (from 10/1/11–9/30/12). During this period, the IRS collected almost $2.5 trillion in revenue and processed 237 million returns, almost 81% of which were e-filed. On average, the IRS spent 48 cents to collect $100 in tax revenue. About 1% of all tax returns were examined. Of the 1.5 million individual returns examined, almost 54,000 resulted in additional refunds. There were 372 million visits to the IRS website, and 97 million taxpayers were assisted through the toll-free telephone helpline or at walk-in sites. An electronic version of the Data Book can be found on the Tax Stats page of News Release IR-2013-32 .