are u just curious as to what your risk is or you have somthing going on to make you curious ? I agree with David ..QUIT FOREVER !! However I never smoked and I was diag,,,But dont increase it by smoking and for 4 cigarettes a week ....you can go without !!! And save yourself some money ,,,which you will need cus of the price of gas ...OK now I am rambling ...Have you ever read " If you give a pig a pancacke "? Well I am rambling like that . All in ALl if you have no symptoms ..go be happy and enjoy life and live it to it fullest ...If you have somthing of concern to you have it looked at . No one could accuraltey give you your % of risk...Just know that smoking can cause so many issues that arent worth it !