Forbes 

 

  “On the 2012 list of The FORBES 400 Richest Americans, there are a total of 45 women, accounting for 11% of the list. They span the country, residing in states from Texas to Wisconsin and California, and hold most of their wealth in companies they built or inherited. The top 20 richest women alone control an estimated $160 billion—more than the entire GDP of New Zealand.”