<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:01a14179-9515-7017-9b75-9eaf70e93095,g:041af7b8-916b-4b7f-97b4-4f5840406de3-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel"/>
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:type="simple" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel"/>
  <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:type="extended">
    <link:label id="lab_ck0001140019_C000008627Member_label_en-US" xlink:label="lab_ck0001140019_C000008627Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">C000008627 [Member]</link:label>
    <link:label id="lab_ck0001140019_C000008627Member_documentation_en-US" xlink:label="lab_ck0001140019_C000008627Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">C000008627</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001140019_C000008627Member" xlink:href="ck0001140019-20261027.xsd#ck0001140019_C000008627Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001140019_C000008627Member" xlink:to="lab_ck0001140019_C000008627Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001140019_C000011524Member_label_en-US" xlink:label="lab_ck0001140019_C000011524Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">C000011524 [Member]</link:label>
    <link:label id="lab_ck0001140019_C000011524Member_documentation_en-US" xlink:label="lab_ck0001140019_C000011524Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">C000011524</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001140019_C000011524Member" xlink:href="ck0001140019-20261027.xsd#ck0001140019_C000011524Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001140019_C000011524Member" xlink:to="lab_ck0001140019_C000011524Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001140019_C000068094Member_label_en-US" xlink:label="lab_ck0001140019_C000068094Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">C000068094 [Member]</link:label>
    <link:label id="lab_ck0001140019_C000068094Member_documentation_en-US" xlink:label="lab_ck0001140019_C000068094Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">C000068094</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001140019_C000068094Member" xlink:href="ck0001140019-20261027.xsd#ck0001140019_C000068094Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001140019_C000068094Member" xlink:to="lab_ck0001140019_C000068094Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001140019_C000008631Member_label_en-US" xlink:label="lab_ck0001140019_C000008631Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">C000008631 [Member]</link:label>
    <link:label id="lab_ck0001140019_C000008631Member_documentation_en-US" xlink:label="lab_ck0001140019_C000008631Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">C000008631</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001140019_C000008631Member" xlink:href="ck0001140019-20261027.xsd#ck0001140019_C000008631Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001140019_C000008631Member" xlink:to="lab_ck0001140019_C000008631Member" xlink:type="arc" order="1"/>
    <link:label id="lab_ck0001140019_C000008599Member_label_en-US" xlink:label="lab_ck0001140019_C000008599Member" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">C000008599 [Member]</link:label>
    <link:label id="lab_ck0001140019_C000008599Member_documentation_en-US" xlink:label="lab_ck0001140019_C000008599Member" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">C000008599</link:label>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001140019_C000008599Member" xlink:href="ck0001140019-20261027.xsd#ck0001140019_C000008599Member"/>
    <link:labelArc xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ck0001140019_C000008599Member" xlink:to="lab_ck0001140019_C000008599Member" xlink:type="arc" order="1"/>
  </link:labelLink>
</link:linkbase>
