What are the U.S. Ski & Snowboard age classifications?

The age classifications for the 2018-19 ski season are as follows:

Age ClassAges as of 12/31/19Birth Year
U87 and younger2012 and later
U108 and 92010 or 2011
U1210 and 112008 or 2009
U1412 and 132006 or 2007
U1614 and 152004 or 2005
U1916 - 182001, 2002 or 2003
U2119 and 201999 or 2000
SR21 and older1998 or earlier