Alan Beban wrote...
Harlan Grove wrote:
....
What's the *reasonable*
assumption to make when presented with unsorted data?

....
. . . The question is whether the OP showed grouped, unsorted data
because his real data is grouped and unsorted, or because he didn't
realize that his sample data didn't represent his real data. . . .
....

In my experience grouped but unsorted data is exceedingly rare because
far & away the easiest way to group data is to sort it. Also, and you
may come to realize this as you gain experience in these newsgroups,
OPs seldom provide sample data that's truly representative of their
real data.

. . . other than that he went to the trouble of grouping the data, .
.. .
....

Unlikely the OP went to any trouble doing so. More likely he did it to
make the repeating codes in the first column more obvious.