Just elaborating on Gord's explanation:
Say existing data in A1 to A61.
Insert a *new* (helper) column A by right clicking in the existing Column A
header and choosing "Insert".
In the NEW Column A, enter 1 in A1, and 2 in A2.
Select A1 and A2.
In the lower right corner of this 2 cell selection you'll see a small black
square, called the "fill" handle.
Hover the cursor over this square until it (the cursor) changes from a fat
white cross to a skinny black cross.
Then *double* click.
This will *automatically* fill the series down Column A, as far as there is
data in Column B.
This gives you the numbers 1 to 61 in the column next to your data in Column
B.
While these 61 numbers are *still* selected, right click in the selection
and choose "Copy".
Right click in the empty A62 and choose "Paste".
NOW, select A1 to B122, and from the Menu Bar:
<Data> <Sort>
Sort by Column A, ascending, <OK>.
And you're done.
Of course, if your data extends beyond Column B, say to Column J, then
select A1 to J122 before completing the sort.