This property defines approval of Symbols as Unicode in version 12.0 in 2019
Characters like ౷,ຆ,ຉ, etc. are listed under 12.0 Age.
554 Characters are present in 12.0 Age starting with the Unicode point U+0C77 that represents the character ౷.
Currently, as per latest version 15.0.0, Unicode supports 26 number of Age. Here are a few examples - 1.1,10.0,11.0, etc.