This question was asked of everyone in a marriage or other long-term partnership, including many whose relationships were initiated well before meeting online was an option.

Some 42% of Americans know someone who has used online dating, up from 31% in 2005.

And 29% of Americans now know someone who met a spouse or other long-term partner through online dating, up from just 15% in 2005.

Some 6% of internet users who are in a marriage, partnership, or other committed relationship met their partner online—that is up from 3% of internet users who said this in 2005.

On an “all-adults” basis, that means that 5% of all committed relationships in America today began online.

Compared with when we conducted our first study of dating and relationships in 2005, many more Americans are using online tools to check up on people they used to date, and to flirt with potential (or current) love interests: Young adults are especially likely to flirt online—47% of internet users ages 18-24 have done this before, as have 40% of those ages 25-34.

And while younger adults are also more likely than their elders to look up past flames online, this behavior is still relatively common among older cohorts.

Additionally, 22% of online daters have asked someone to help them create or review their profile.

Women are around twice as likely as men to ask for assistance creating or perfecting their profile—30% of female online daters have done this, compared with 16% of men.

These are among the key findings of a national survey of dating and relationships in the digital era, the first dedicated study of this subject by the Pew Research Center’s Internet Project since 2005.