As of September 1 2011, the UDC includes a total of 20,194 full-text-searchable titles. To celebrate this milestone, we put together some approximate numbers that express growth rate and use over the last few years.
Approximate item count at June 1 of each year:
2009: 9,000 items total
2010: 14,000 items total
2011: 18,000 items total
Download rates, indicating legitimate uses of UDC content (gaming and robot downloads excluded) for May 30th - June 1 of each year:
Congratulations to everyone who has contributed to the success of the UDC!
-- Beth Kaplan and Lisa Johnston, UDC Co-directors