perl -lp with 
$t+=$_,$r{$.}+=$_,$c[$n++%4]+=$_ for((split)[1..4])x/^\s*\d/;print$_.=
+" $r{$.}"
}{print sprintf"       %10d %10d %10d %10d $t",@c[0..3]

[download]

gives me
COUNTY       2001       2002       2003       2004
------     ------     ------     ------     ------
 26005        432        505        547        555 2039
 26021        910        984       1026       1077 3997
 26023        225        282        272        299 1078
 26025        711        796        809        899 3215
 26027        250        319        318        313 1200
 26059        196        221        242        292 951
 26077       1170       1371       1439       1439 5419
 26149        355        415        346        367 1483
 26159        414        434        504        493 1845

             4663       5327       5503       5734 21227

[download]

In reply to Re: Calculating subtotals from a table by Jasper
in thread Calculating subtotals from a table by pugsly62

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