I believe those figures were solely based off the
Post# of 56323
According to the article, Colorado's new projected tax revenue is going to be approximately 132 million. I'm not a mathematician by any means, but with a 3.5% state tax, that should put the the market somewhere around $3.75 billion.
Overall, this is just the beginning of a long road. I'm long FITX because of this. Every government sees the potential opportunity to capitalize on a large untaxed market. In addition, I feel that as it becomes more legal, it is also going to become more socially acceptable and further expand the potential market.