Remove spaces in data copied from Excel

I have to copy certain columns from an Excel sheet and paste it in a Word table.

That's a doddle, but for some reason after I've pasted the columns all the values have a number of spaces in front of them.

How do I prevent this from happening. Deleting the multiple spaces is easy, but the last one is not so easy. Please note that I am forced to use spaces as the thousands separator, so I cannot delete all the spaces!