This property defines approval of Symbols as Unicode in version 2.1 in 1998
Characters like €,, etc. are listed under 2.1 Age.
2 Characters are present in 2.1 Age starting with the Unicode point U+20AC 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.