Work Injury Statistics in the USA

I have not yet found any statistics for last year but for prior years there are statistics on work injuries available at the national level. You can check it out at this link. I am not sure why Colorado only reports on fatal injuries to the US Bureau of Labor Statistics but the overall statistics show that for 2008 there were work injuries in 3.9% of the working population. This has been trending down over the last several years. Of those injuries about one-third or so result in time lost from work. Are these statistics accurate? I suspect it is much like auto accidents...only some are reported. Colorado has its last reported year as 2005 and is based on the actual filings of claims. In 2005 there were some 29000 lost time claims in Colorado. Does the poor economy affect anything? Probably so since the unemployed never have work injuries.