Roughly one-third (oops -- percentage -- 33% ). Used to be well over half, but I have less free time to comb through racks and a much clearer image in my head of what I want (and the internet is so much bigger and faster than it used to be!).
For the past few months, I've been casually tracking the age of the pieces in any given outfit, and whether they were purchased new or used. Today I'm wearing a blazer from 2016 (secondhand), jeans and henley from 2017 (both purchased new), boots and parka from 2019 (boots secondhand, parka brand-new). So that's 2 out of 5. (Bags, accessories and jewelry are a bit harder for me to track, because those are often gifts, handed down, or shared between me and my family.)
