http://www.industryventures.com/wp-content/uploads/2017/02/Pic-3-v2.png http://www.industryventures.com/wp-content/uploads/2017/02/P... If you add the averages

http://www.industryventures.com/wp-content/uploads/2017/02/Pic-3-v2.png http://www.industryventures.com/wp-content/uploads/2017/02/P... If you add the averages of each category(75x for the last category) in this source, you'll end up with an annualized return of 9.4% over the 10 years mentioned in the image. That is not far of the average return of the SP500.