A new Washington Post/ABC News poll shows support for gay marriage has slipped slightly.

The survey, released Thursday, reported a 2% drop in support nationwide.

When asked, “Do you think it should be legal or illegal for gay and lesbian couples to get married?” 47% percent of respondents answered “legal.” But the same question faired better 10 months ago when 49% agreed it should be legal.

And for the first time since 2004, the number of people who believe it should be illegal for gay couples to marry has increased. Sixty-two percent of respondents agreed it should be illegal in 2004. That number steadily decreased to 46% last year. But this week's survey showed a four point increase.

The good news, however, is a large number of Americans believe gay couples deserve to have their relationship legally recognized.

Sixty-six percent of respondents said gay and lesbian couples “should be allowed to form legally recognized civil unions, giving them the legal rights of married couples in areas such as health insurance, inheritance and pension coverage.” In 2003, the first year the question was asked, only 40% of respondents agree and 51% disagreed.

Support for gay marriage is highest among 18 to 29 year-olds. A large majority (65%) of young adults believe gay marriage should be legal, while a large majority (65%) of seniors over 65-years-old disagree.