Jolie's reputation began to change positively after she, at age 26, became a Goodwill Ambassador for the United Nations High Commissioner for Refugees, later commenting, "In my early 20s I was fighting with myself. Now I take that punk in me to Washington, and I fight for something important." Owing to her extensive activism, her Q Score—the industry's measure of celebrities' likability—nearly doubled to 25 between 2000 and 2006. Her recognizability grew accordingly; by 2006, she was familiar to 81% of Americans, compared to 31% in 2000. She became noted for her ability to positively influence her public image through the media, without employing a publicist or an agent. Her Q Score remained above average even when, in 2005, she was accused of ending Brad Pitt's marriage to Jennifer Aniston, at which point her public persona became an unlikely combination of alleged homewrecker, mother, sex symbol, and humanitarian. A decade later, Jolie was found to be the most admired woman in the world in global surveys conducted by YouGov in 2015 and 2016.