Hi Jent,
Ok this is pretty easy to do. We need to do two things.
1. Firstly we need to make sure the Pivot Table is pointing towards the table with the additional data (new rows) added.
2. Secondly we need to refresh the Pivot Table to take in the new data.
When we built the first pivot table it is likely that the Pivot Table was linked to your data by a fixed range. In my original example this was Sheet1!$A$2:$B$12. If you are going to reuse the same pivot table, but add new data then the best way is to give your data a named range.
To create a named range is very easy. Select your entire table that you use in the pivot table plus one blank row at the bottom, and click in the Name box, to the left of the formula bar and enter a suitable name, "Pivot_Range" and press return.
The reason that we included a blank cell at the bottom is if you insert new data between the last row of the table and the blank row, Excel will automatically adjust the range of the defined name. This does mean you will need to
insert new rows every time you add data, rather than copy and paste. However if you make a mistake you can manually change the range of a defined name, by using Insert > Name > Define from the main menu, select the name you want to amend and change the cell references.
Now we need to amend the Pivot table to use the Named Range, rather than the fixed reference. In Excel 2011, click the Pivot Table, select Pivot Table menu bar and click the change source button.
Now enter the name you defined for your pivot table in the dialog box.
I think you might have a previous version of Excel and from memory I think you need to click on the pivot table and go back in the pivot table wizard and then step back to you get to the part that you define the range of the pivot table, and enter the defined name, but I know there is a way to do it.
To refresh the data, right mouse click on the pivot table and you will see an option to refresh the pivot table.
In future copy and insert the rows with the new data into the source table between the last row and the blank row that you defined in the named range, then refresh the pivot table.
Hope this helps
James