You will have to count how many two week periods you have posted in. You can see the dates of the periods in this spreadhseet:
https://docs.google.com/spreadsheets/d/12saLhlUoqIdairxzuSPu6EYGrt7FN2lOstO1yDjCEbA/editTedious work but that's the only way you'll know currently.
Also, whilst you haven't stated you want to sell it I'm sure this is now likely given this thread you just created:
Thanks to merit system...i have lost all hopes now to rank up any way close to Sr.Member or even Full member ever...i think the users like me are in huge disadvantage now...because i dont think many users care about giving merit to anyone...i think if givers are 10 and recievers are thousands or even more in the ratio..even if some day i get lucky and some one give me merit...it will take many decades to reach Sr.Member like that...
Also the fact that a user can give only half the merit he recieved and all those concepts i think are huge disadvantage for a user like me...
I know this issue has been raised many times and i shared my feeling which is this is really unfair for all the users like me