Roadracingworld.com asked for participant data from USGPRU and received the following for the organization’s nine years of operation: Year, Number Of USGPRU Event Weekends, Number Of Participating USGPRU Riders 2010, 13 USGPRU event weekends, 116 total USGPRU riders 2009, 11 USGPRU event weekends, 115 total USGPRU riders 2008, 14 USGPRU event weekends, 143 total USGPRU riders 2007, 13 USGPRU event weekends, 135 total USGPRU riders 2006, 16 USGPRU event weekends, 141 total USGPRU riders 2005, 12 USGPRU event weekends, 121 total USGPRU riders 2004, 13 USGPRU event weekends, 100 total USGPRU riders 2003, 11 USGPRU event weekends, 66 total USGPRU riders 2002, 11 USGPRU event weekends, no data on total USGPRU riders (Roadracingworld.com estimate, 60) Totals: 114 USGPRU event weekends, 937 confirmed USGPRU total riders, 999 estimated USGPRU total riders Data regarding participating rider age was not available at post time. Data applies to USGPRU-organized and operated classes.