First of all, she was never given the chance to have a solo series before now. Only mini-series.
As for numbers...
Well, looking at the link that was posted:
46 Storm 1 $3.99 Marvel 47,566
86 Ms Marvel 6 $2.99 Marvel 36,041
121 Black Widow 8 $3.99 Marvel 24,555
126 Captain Marvel 5 $3.99 Marvel 23,666
127 She-Hulk 6 $2.99 Marvel 23,562
152 Elektra 4 $3.99 Marvel 19,125
Just looking at #1 issues:
Black Widow 1: 53,887
Ms. Marvel 1: 50,286
Elektra: 47,676
Storm 1: 47,566
Captain Marvel 1: 44,248
She-Hulk 1: 41,894
So we have yet to know how Storm #2, etc. will hold up, but that's where things are right now.
http://www.pinterest.com/pin/225531893814497270/