I have been a Permanent Resident for 7 years. I am married to, and living with, a U.S. citizen. I have been married to that U.S. citizen for 35 years. My spouse has been a U.S. citizen for 9 years. During the past three years, I have not been out of the country for 18 months or more. During the past three years I have been out of the country during the following periods: 2011 (January 8-June 18 [162 days= 5.4 months]; August 2-December 7 [127 days=4.2 months]); 2012 (January 11-June17 [159 days=5.3 months]); 2013 (zero days). Total out = 448 days = 14.9 months. During the last five years I have not taken a trip out of the United States that lasted one year or more. I want to apply using the three years dispensation. According to my calculation I should be eligible to apply by end of Sept.2013. If that is correct then I may apply by July 1 2013 (90 days earlier). Please advise if my calculation is correct and when may I apply.