Hispanic numbers in the US now more driven by births than immigration

Some information from here in Spanish:

For the first time, the growth of the Latino community in the United States is being produced by births and not by immigration. In the census of 2010 one can see the growth of the Hispanic population in the United States, 43% greater than that in the last census in the year 2000. These numbers are not surprising, given that the growth the previous decade (1990 to 2000) was 58%. According to the State University of California, the principal factor in the increase in population was births, more than from immigration. This is the first time in history that this has been the case. If the growth in population is maintained, by 2030 the United States will be the country with the largest number of Spanish speakers in the world, surpassing even Mexico and Spain.

Edit: I see the Economist has two articles on more or less the same subject today: here and here.