For Colorado: for football, generally our database starts in 2008 for 5A, 2009 for 4A, and 2010 for all other divisions. Including coach records for years previous to our database in lumped into a single value where available.
Basketball and Baseball starts in 2011-2012. All other states generally have intermittent data until 2012-2013.
Incomplete data. The record may not include all wins and losses per note above.