Non-alphanumeric character counts for drupal/modules/:

     total      % of all chars   % of all non-alphanumerics
     -------    --------------   --------------------------
'    32109      3.565341%        17.638819%
$    15157      1.683013%        8.326375%
)    14224      1.579414%        7.813839%
(    14221      1.579081%        7.812191%
_    12632      1.402641%        6.939287%
=    11850      1.315808%        6.509701%
,    11280      1.252516%        6.196577%
>    9307       1.033437%        5.112725%
;    7004       0.777715%        3.847591%
/    6893       0.765390%        3.786614%
.    6738       0.748179%        3.701466%
}    4367       0.484906%        2.398976%
{    4366       0.484795%        2.398427%
-    4171       0.463142%        2.291305%
*    4118       0.457257%        2.262190%
[    4069       0.451816%        2.235272%
]    4068       0.451705%        2.234723%
"    2950       0.327564%        1.620559%
<    2544       0.282482%        1.397526%
#    2373       0.263495%        1.303588%
%    2104       0.233625%        1.155815%
:    1442       0.160118%        0.792151%
\    1278       0.141907%        0.702059%
&    1034       0.114814%        0.568020%
?    419        0.046525%        0.230174%
!    399        0.044304%        0.219187%
@    291        0.032312%        0.159858%
|    288        0.031979%        0.158210%
+    266        0.029536%        0.146125%
^    71         0.007884%        0.039003%
~    3          0.000333%        0.001648%
`    0          0.000000%        0.000000%