Same-sex marriage: Where in the world is it legal?

(CNN)Alabama is the latest U.S. state to change its stance on gay marriage and start issuing some marriage licenses to same-sex couples. This is despite Alabama Supreme Court Chief Justice Roy Moore's instructions to the probate judges to dismiss the federal ruling.

Across the Atlantic in Europe, a low turnout at a referendum in Slovakia on Saturday failed to strengthen a ban on gay marriage and prevent gay couples from adopting. The poll, organized by Alliance for the Family, also asked voters whether sex education and euthanasia should be made optional at school.
As it stands, the following 18 countries have legalized same-sex marriage and two allow the union to take place in some jurisdictions.
COUNTRIES WHERE SAME-SEX MARRIAGE IS LEGAL
    2000 The Netherlands
    2003 Belgium
    2005 Canada
    2005 Spain
    2006 South Africa
    2009 Sweden
    2009 Norway
    2010 Portugal
    2010 Iceland
    2010 Argentina
    2012 Denmark
    2013 Uruguay
    2013 New Zealand
    2013 France
    2013 England / Wales
    2013 Brazil
    2014 Luxembourg
    2014 Scotland
    COUNTRIES WHERE SAME-SEX MARRIAGE IS LEGAL IN SOME JURISDICTIONS
    2003 United States
    2009 Mexico
    Source: Pew Research Center, January, 2015