Trulia's accuracy on average home values is high for Santa Fe. So I do not think they have all the info at hand. But I will say Trulia has been a valuable resource to my clients, a tool that helps them see an overview of the Santa Fe marketplace.
On the right hand side of the SFAR home page you'll see a column titled Local Market Update. There you can click on an area and get some year-to-date statistics, which is full of interesting data and probably has the information you are looking for.
As a Board member of SFAR, and a member of their Technology Committee I can tell you that we are consistently thinking of ways to improve the customer experience. I, for one, welcome comments such as yours because they help us see the public's perspective on our services. If my response doesn't satisfy your needs, please let me know - either on this site or privately - and I will do what I can to assist.
And the fact that Trulia's info may not be complete should not be blamed on the SFAR. I'm not sure if your complaint is with the SFAR site, or Trulia or both?