When Satoshi Nakamoto created the first bitcoin in January 2009, there were nearly 21 million coins left to be mined. As 80% of the total number of bitcoins have already been mined by January 13, there are only one-fifth of the capped supply that will be mined in the coming years.
Over 16.8 million bitcoins have now been mined by the miners worldwide and there will be another 4.2 million digital coins that is still left.
Number of Bitcoins Mined
January 15,2016 : 15,089,500 (71.8%)
January 15,2017 : 16,104,750 (77%)
Here it is not a shocking factor that we have only got progress of 6.8% mining of the whole coin in one year , because here this was already fixed concept that was clearly saying that with the mine if every single btc , the mine if next btc is tough work than what was required for the second last one .
So here I am thinking that it will not be easy for us to achieve 100% atleast for 10-20 years to mine whole the bitcoin that exist in the bitcoin algorithm .
Well here we should see as a positive factor that is the increase in demand but giving in actual lack of supply in market and in that case increase in price of bitcoin .