This story is part of the KXAN Data Hub, where numbers help tell the whole story.We've created several data-driven stories and databases on topics including weather and climate, politics, education, sports and growth in Texas. Each story in the KXAN Data Hub is updated as new data becomes a vailable. AUSTIN (KXAN) — It's March, and you know what that means — time for some madness! This year, more than 3.4 million women's NCAA Tournament brackets were made on ESPN. But how many perfect brackets remain? Looking for our Men's Tournament bracket tracker? Click here! Almost a fifth of all brackets were busted in the first game, when Michigan defeated Iowa State. Indiana's win over Utah knocked out more than 1.2 million brackets. Later, 633,000 brackets were busted when Oregon beat Vanderbilt. After 13 games, the number of perfect brackets dropped below 100,000, thanks to Richmond's win over Georgia Tech. By the end of the tournament's first day, just 58,424 brackets remained intact — accounting for 1.71% of all brackets. South Dakota State's win over Oklahoma State later wiped out 74% of remaining brackets, dropping the total below 12,000. With 63 games in total, what is the longest stretch of correctly-predicted games in the women's tournament? According to the NCAA, a bracket last year correctly predicted the outcomes of the first 50 games. ...read more read less