Non-alphanumeric character counts for svk/lib/SVK:

     total      % of all chars   % of all non-alphanumerics
     -------    --------------   --------------------------
$    14340      2.171309%        11.826316%
:    9480       1.435426%        7.818234%
-    8557       1.295669%        7.057029%
"    8280       1.253727%        6.828584%
>    7028       1.064154%        5.796050%
_    6559       0.993139%        5.409261%
;    6238       0.944535%        5.144530%
)    6087       0.921671%        5.019999%
(    5997       0.908043%        4.945775%
/    5820       0.881243%        4.799802%
,    5420       0.820676%        4.469919%
=    5215       0.789636%        4.300854%
{    5054       0.765258%        4.168076%
}    5051       0.764804%        4.165601%
.    4750       0.719227%        3.917364%
'    3351       0.507396%        2.763597%
#    2723       0.412307%        2.245681%
\    1824       0.276183%        1.504268%
@    1676       0.253774%        1.382211%
%    1557       0.235755%        1.284071%
[    1503       0.227579%        1.239537%
]    1502       0.227427%        1.238712%
|    701        0.106143%        0.578120%
<    645        0.097663%        0.531937%
?    424        0.064200%        0.349676%
&    400        0.060567%        0.329883%
~    269        0.040731%        0.221847%
!    267        0.040428%        0.220197%
+    217        0.032857%        0.178962%
*    163        0.024681%        0.134427%
^    157        0.023772%        0.129479%
`    0          0.000000%        0.000000%