The new generation of American boys is less likely to be circumcised, however. A HCUP statistical brief reported in February 2012 that circumcisions had dropped from around 60% in 2000 to 54.5% in 2009. The CDC's Division of Health Care Statistics (Owings et al.) reported an estimate in August 2013 that "cross the 32-year period from 1979 through 2010, the national rate of newborn circumcision declined 10% overall, from 64.5% to 58.3%." A July 2013 study in the "Sexually Transmitted Diseases" journal by Introcaso et al. posed a different question, namely how many boys and men aged 14 to 59 in the 2005–2010 period (that is, who were newborns between 1946 and 1996) were circumcised, concluding that 80.5% of them were. Because Introcaso et al. included men aged 32–59 but excluded boys aged 0–13, this suggests that circumcision of newborns was much more widespread in 1946 before it dropped to 64.5% in 1979.