Since the early 1970s, the Salt Lake City Redevelopment Agency (RDA) has dedicated a percentage of TIF income toward housing projects, serving households at a variety of income levels. From 1999 to 2009, the RDA contributed a total of $6,656,687 to the Salt Lake City Housing Trust Fund. In addition to these contributions, the RDA allocates revenue into two RDA housing funds: a project-area housing fund and a citywide housing fund. Between 1980 and 2010, RDA TIF income had provided partial funding for a total of 1,516 housing units in 29 projects affordable to households earning less than 80 percent of area median income.