I've been a green card holder for almost 5 years and im about to apply for my US citizenship but i lost the passport that i had for my first 3 years of being a green card holder , and i don't remember the exact dates that i traveled outside the country in those years but i know for sure that it was never more than 6 months every trip , how am i gonna do with my application when it says to enter the dates of when i traveled ? ? is it going to be a problem ? can they verify their self ? please help !