According to the Pew Research Center, the number of stay-at-home fathers in the US nearly doubled in the period from 1989 to 2012, from 1.1 million to 2.0 million. This trend appears to be mirrored in a number of countries including the UK, Canada and Sweden. However, Pew also found that, at least in the US, public opinion in general appears to show a substantial bias toward favoring a mother as a care-taker versus a father, regardless of any shift in actual roles each plays.