Passage: 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.Jolie's general influence and wealth are extensively documented. In a 2006 global industry survey by ACNielsen in 42 international markets, Jolie, together with Pitt, was found to be the favorite celebrity endorser for brands and products worldwide. Jolie was the face of St. John and Shiseido from 2006 to 2008, and a decade later became a spokesmodel for Guerlain. Her 2011 endorsement deal with Louis Vuitton, reportedly worth $10 million, was a record for a single advertising campaign. Jolie was among the Time 100, a list of the most influential people in the world as published by Time, in 2006 and 2008. She was named the world's most powerful celebrity in Forbes's Celebrity 100 issue in 2009, and, though ranked lower overall, was listed as the most powerful actress from 2006 to 2008 and 2011 to 2013. Forbes additionally cited her as Hollywood's highest-paid actress in 2009, 2011, and 2013, with estimated annual earnings of $27 million, $30 million, and $33 million respectively.

Question: How many Americans knew Jennifer Aniston in 2006?
81%