Last week Univision attracted more prime-time viewers than NBC, marking the second time in four weeks that the Spanish-language network beat one of the top English-speaking broadcast networks, reports the Los Angeles Times’ Company Town blog.

The results may reflect changes in the U.S. demographics, since the 2010 census showed that Latinos make up the fastest-growing segment of the population. Univision said that during the first quarter it beat NBC about half the time in prime-time viewers in the key 18-49 demo.

The article notes that Univision typically falls behind NBC by a wide margin in total viewers, but says the gap has been narrowing as Univision adds viewers and English-language TV broadcast networks lose them.

NBC’s numbers during the first quarter fell short of the figures from a year earlier, when the network had the Vancouver Olympics.