Help trying to align cells by symbol / character

Hi all,

I'm trying to replicate a table format from a paper,

They have centre aligned the following cells by the ± symbol. I have searched online and only found aligning by decimal.

Example input (1 column, 3 rows)
536 ± 49.2
68.4 ± 48
502.9 ± 39.4

I would be very grateful for any advice!

Edit For those interested the Table I'm trying to copy is here http://link.springer.com/article/10....-0690-4#page-1

Update: Solved!

Alex Frolov, http://superuser.com/questions/97654...ls-by-a-symbol

Please create the helper column with the following formula

=REPT(" ",10-FIND("±",A1))&A1

where A1 - your original string and 10 - the maximal number of characters before "±" in your data

Then apply the monotype font (e.g. "Courier new") to this column