SYDNEY, Australia — Unlike the United States, Canada and New Zealand, Australia stands out as a developed, English-speaking country that has not legalized same-sex marriage.

But a new survey shows Australian attitudes on the issue are rapidly changing, suggesting it is Parliament that is falling behind international peers in recognizing gay marriage.

From 2005 to 2015, there was a shift toward the view that gay couples should have the same marriage, parenting and employment rights as heterosexual couples, according to the University of Melbourne’s annual survey of household, income and labor dynamics in Australia.

The proportion of women supporting such rights for gay couples rose to 67 percent in 2015 from 43 percent in 2005. Among men, the proportion who agreed rose to 59 percent from 32 percent.