2010-2011 Report of Accidents among Swedish Skaters:
These reports present an invaluable view of of the ground truth, particularly for skating in the Swedish style. In North America, other than Canada and Minnesota, reports on ice accident statistics are hard to come by, even for deaths on ice.
Click here for the 2011 report: It is mostly in Swedish but it includes a summary in English. The table, while in Swedish, is easy to make sense of (Google Translate can help if needed).
Click here for the three years that these reports have been published with English summaries.
If you can read Swedish there are several other annual accident reports and LOTs of great ice insight on the www. Click here for some starting links.