Means that you are not storing your previously acquire data.
What you can do is to build an array, appending the newly acquired data to the previous ones, and use a shift register to store the data at each iteration of the loop.
This method is not the best, but simple enough to start with. See the attached example.
A better solution is to *insert* the data in the table, as shown in the second example.
Chilly Charly (aka CC)