First, to make sure I understand your question ….
Sounds like you have data that looks like this and you want the last row in a column.
Assuming I have that correct, there is a way you can pull the last values using Global variables.
First, use a Number from column variable, to pull the last row number.
Then set up a Number from column variable for each column that uses that row number.
NOTE: Once you create one of these, you can select the variable object, use Command-C to copy, Command-V to paste, and then edit for the next column. That makes it a lot faster.
Once, the variables are created, refer to them in the data table.
For example, if you have a text column with the name of the country …
Use the gear menu to convert to a number column and change the display to show the value of the variable.
The column ‘Last’, shown above, can used just like any other number column and will update dynamically as your data changes.
Note you can also change the value of the variable ‘Row’ anytime to change the data pulled for all the columns. Maybe even make it a slider so you can dynamically change the row that is selected.
In terms of setting this up, clearly this could be very tedious if you have a lot of countries.
In that case, consider converting the format to a Flattened data set. Then you can use the Pivot command to filter and query the data.
Hope this helps!