For the first time in at least two decades, the population of illegal immigrants from Mexico living in this country significantly decreased, according to the report. In 2011, about 6.1 million Mexicans were living here illegally, down from a peak of nearly 7 million in 2007, it said.
Mr. Passel said the data does not allow Pew demographers to say which factor was most important in reducing the population of illegal immigrants. The report cited a mix, including high unemployment in the United States, particularly in the construction industry; heightened border enforcement and increased deportations by the American authorities; and a long-term decline in birth rates in Mexico.
I suggest you reread my post. This story is about ILLEGAL IMMIGRANTS. Legal Hispanic (including Mexicans) permanent immigrants have not decreased significantly. They still make up the majority of legal immigrants and those numbers have not been declining. We have limits as to the number of legal immigrants we admit each year. That is the only reason why there are not significant increases.