I got married on October,2012 and still married.I filed the papers on 2015 september and I received directly 10 yrs green card on February 2016 , since we have been already married more than 2 years when we had a interview.They gave unconditional green card straight.I do not know when i can apply for a citizenship ? one year after unconditional green card or still counting 3 years from received date of 10 yrs gc .