thing to do. it is an estimate there. are many ways to arrive at this estimate. we use something called the residual method. we are estimating something. taking a guess based on characteristics of folks who are here. greta: how about ethnic background? we talk about undiagnosticmented immigrants 11.9 mill kwrolg for 2008 of those 7 mill john from mexico vast majority are from latin america with mexico being the dominant greta: can you determine let s take arizona any specific impact uponv state of arizona. for the state of arizona while that doesn t seem as large as california, 500,000 puts arizona in the top 10 in in terms of the size. greta: how about texas? i don t remember texas, i