The plastic surgery industry is worth over $20 billion dollars, according to the Global Cosmetic Surgery and Service Market Report. That alone is worth more than the individual GDPs of 71 countries.It wasn’t always that way. Plastic surgery began during World War I when doctor Harold Gillies used skin grafts, as well as a “tube pedicle,” to fix faces of soldiers who were injured by explosions on the front lines. For a while, it remained a way to fix severe disfigurements.But when movie stars Rudolph Valentino and Gloria Swanson got plastic surgery for aesthetic reasons in the 1920s, the industry as we know it today was born.Going under the knife has seen a surge in popularity over the past 20 years. This could be due to improved medical practices, decreased stigma or both. Celebrities seem to be more open about their procedures, which could be influencing how the average person feels about the idea.Today, more people get surgery for cosmetic purposes than ever before. Though the race to the surgical table seems to have slowed compared to the early 2000s, from 2014 to 2015 there was still a two percent increase in the number of cosmetic procedures performed in the United States.Given the long and consistent rise in popularity of plastic surgery, the experts at HealthGrove, a Graphiq health data site, used the most recent data (2013) from the American Society of Plastic Surgeons to aggregate the total number of operations for the major types of plastic surgeries to see which procedures are the most common.