Nearly one-fourth of online shoppers in the United States say they make a Web purchase at least once a week, according to a recent report from Bronto Software.

The report was based on data from a survey conducted in January 2015 of 1,012 consumers in the United States who had bought online within the previous 12 months. (Respondents who had not made a purchase online in the previous year were not included in the analysis.)

Some 24% of respondents say they are "frequent shoppers" (going online at least once per week, on average, to make a purchase); 36% are "occasional shoppers" (once a month, on average); 40% are "infrequent shoppers" (once a year, on average).

More men than women report shopping online at least once per week, on average (30% vs. 18%).

Americans age 30-39 are the most frequent online shoppers, followed by 18-29-year-olds.

Although seniors (65+) are the least active online shoppers, 42% still make at least one purchase per month online, on average.

Online shoppers in the western US are the most active, with 66% shopping online at least once per month, on average.

About the research: The report was based on data from a survey conducted in January 2015 of 1,012 consumers in the United States who bought online within the previous 12 months.