The original html output has newlines and multiple spaces in the table header names, so they don't match the headers you specified. Adding the following after retrieving the html corrected the problem:

$raw_html =~ tr/\n//d;
$raw_html =~ tr/ //s;
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The output is now:

Table (2,4):
eMap, 2.90, All, August 7, 2003
eTrex, 2.14, All, June 14, 2002
...
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