The Centers for Disease Control and Prevention reported last week that the birth rate among 15- to 19-year-olds had fallen to a record low 31.3 births per 1,000 in 2011. Teen birth rates dropped for all racial and ethnic groups, but fell the most among Hispanic teens: from 75.3 per 1,000 in 2007 to 49.4 per 1,000 in 2011.

Teen births have been trending lower for the past three decades. In 1991, the birth rate for all teens was 61.8 per 1,000, according to the CDC. But the decline has accelerated since the start of the Great Recession: from 41.5 per 1,000 in 2007 to 31.3 in 2011, a 25% drop. (While fertility rates fell during that period for all age groups except 40 and above, the declines were sharpest for women in their teens and 20s.)

A Pew Research Center state-level analysis from 2011 found that birth rates tracked the faltering economy: States that experienced big economic declines in 2007 and 2008 tended to have large fertility declines in 2008 and 2009.

And as that report noted, Hispanics, who were hit hardest by the recession in terms of employment and wealth, also have experienced the largest fertility declines since the onset of the recession. According to the latest CDC report, the Hispanic fertility rate fell by 18% between 2007 and 2010, versus a 4% decline for non-Hispanic whites and a 7% drop for non-Hispanic blacks.

For Hispanic teens, behavior may be aligning more closely with their views of teen pregnancy. A 2009 Pew Research survey found that Hispanics ages 16 to 19 took a dim view of people their age having children: Three-quarters called teen pregnancies “a bad thing for society,” and seven in ten (69%) agreed that becoming a teen parent prevents people from reaching their goals in life. (Among young adults, ages 18 to 25, 76% of Hispanics called teen pregnancies bad for society, versus 90% of all 18- to 25-year-olds.)

There also were generational differences in attitudes toward teen pregnancy. The 2009 Pew Research study found, for instance, that while 69% of first-generation Hispanic teens called teen pregnancy a bad thing for society, 86% of third-generation and higher Hispanic teens did.

Overall birth rates have continued to drop through the tepid recovery: Among  all women of childbearing years, the rate has fallen from 69.3 births per 1,000 in 2007 t0 a preliminary 63.2 in 2011. That may represent a lag between statistical indicators of recovery and people believing their own lives are improving: Previous research suggests that while people put off having children during economic downturns, they “catch up” once conditions improve.

The typical (median) teen Facebook user has 300 friends. The larger a teen’s network, the more likely they are to have a wider variety of friends and share more personal information. In the interactive below, click through the range of network ‘friend’ sizes to see changes in what they share, and how they compare to all teen Facebook users.