You are given a sentence in English. Your job is to translate the English sentence into Persian.

I've been fascinated by this little mushroom for over 16 years now.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
بيشتر از ١٦ سال كه من شيفته اين قارچ كوچولو شده ‌ ‌ ام.