Ok, once again the annoying question about grades but I will be very gratefull if you can answer this question:
when you have two cum laudes and two magna cum laudes and you are ranked for two years on a row as the 9best (on 486) student and then you now a little dip the third year (only 50) and then the last (fourth) year again with the 10 best, do you make a chance with some good universities in the USA?
(with working experience, both legal as academic)

You must not think that I want to brag. I only want to ask a simple important question.

If I were you I wouldn't worry too much about it. Most likely they may just think some kind of 'major/life' issue occurred at that point in your life. (i.e. job loss? divorce?). However, If you still think it's that relevant, you may decide to address it under 'how I overcame obstacle(s) in my life' or 'how I sprung back from adversity' etc. (I refer to this as my State of the Union Speech!).

Don't worry about bragging. If you've got it, flaunt it. If you don't have it, fake itor how else would people truly know? Donald Trump says You've got to be your own full-time marketing campaign 24 hours a day... because nobody else will!

Best of Luck!