Smoking

Hi im new here. I have had two procedures, one 2014 with alan feller 2000 grafts and one in august 2017 with dr path of 1200all in frontal region. Have been on 1.25 fin and minox. Recently ive went to 5mg oral minox for 5 months so far. What i would like to ask is the relationship between smoking and mpb. I have read alot about 20 a day plus causing accelerated loss. Ive probably avereaged 10-15 max per day for 13 years. Im 29. I still have some thinning on crown. This is why dr path prescribed oral minox. I have cut down smoking to almost only 2 or three per night some days none. What are opinions on the effect of smoking and hairloss?