Here's a link to some averages The Villages has posted on the Districtgov.org web site. It also gives a method to calculate useage on non-standard home sites.
We have a designer on a standard sized interior lot. However due to all the rain we've gotten in the past year there have been many weeks when we did not run our system. I just calculated our average useage for the past 12 months and it was about 2800 gal per billing cycle (which is a lot less than the 7200 gal average we should use according to this link). Our useage includes last spring when we had new landscaping and irrigated more often.
http://www.thevillageswaterwisdom.co...owMuch1109.pdf
Hope this info is useful for you.