Sort a column chart by x axis data category

I have data like this 

<10	10+	50+	75+	100+	Not at Customer	DateKey	InsertTimestamp
789	1303	458	242	98	2441	20170111	2017-01-11 10:07:11.620
742	1492	658	328	139	2560	20161228	2016-12-28 00:00:00.000
758	1509	666	348	190	2660	20161221	2016-12-21 00:00:00.000
766	1529	669	399	250	2760	20161214	2016-12-14 00:00:00.000
792	1725	690	400	360	2360	20161207	2016-12-07 00:00:00.000
800	1824	750	500	470	2260	20161130	2016-11-30 00:00:00.000
825	1700	890	600	580	2160	20161123	2016-11-23 00:00:00.000
852	1600	850	290	426	2460	20161117	2016-11-17 00:00:00.000
890	1505	700	333	400	2960	20161109	2016-11-09 00:00:00.000
642	1400	600	300	120	2550	20170104	2017-01-04 00:00:00.000

which plots toa BI chart like so

What I want to do is sort the bottom column out as <10 , 10 + 50 + 75 + and then 100 +, not at customer.

Since I have pivoted the data to get it to the table above I dont have the category now in one column for a sort order as is the norm, any ideas on how to do this? 

ie, Normally one would have something like this

 daysbanding    no of products                    sortorder

< 10                       71                                       1
10+                        702                                      2
50 +                       462

but to get the chart I want I need the data to be like the first table.