aa_	count_n
0	0
1	66449
2	0
3	76570
4	0
5	0
6	0
7	0
8	0
9	0
A	27809
B	1
C	3852
D	18425
E	23652
F	16563
G	22696
H	7960
I	24926
J	0
K	23570
L	37257
M	9225
N	18314
O	0
P	13701
Q	17501
R	16915
S	21124
T	18766
U	0
V	23479
W	4410
X	28
Y	12086
Z	0