XSLT COUNT FUNCTION

I can successfully count all incomingAnswered calls from it's immediate ancestor, in this case extension id="10002".

What I want to do is count from a higher level, in this case <site id="2" name="Tech Support">.

So basically irrespective of how high in the hierarchy I am I want to be able to count all incomingAnswered calls for all children.

Can anyone please advise.

Thank you.

HERE IS XML CODE EXAMPLE:

<?xml version="1.0" encoding="utf-8"?>
<overviewData>
  <items id="0">
    <region id="1" name="New Items">
      <site id="2" name="Tech Support">
        <extension id="10002" name="2361" extensionNumber="2361">
          <incomingAnswered id="1">
            <cdrRecord startDate="23/12/2004" startTime="11:12:00" cli="01229763522" destination="2361" sourceLocation="Millom" duration="03:06:20" cost="0" />
            <cdrRecord startDate="23/12/2004" startTime="11:12:00" cli="09830371093" destination="2361" sourceLocation="Premium Rate" duration="03:06:20" cost="0" />
            <cdrRecord startDate="23/12/2004" startTime="11:12:00" cli="01233763522" destination="2361" sourceLocation="Ashford" duration="03:06:20" cost="0" />
            <cdrRecord startDate="23/12/2004" startTime="11:12:00" cli="118600" destination="2361" sourceLocation="UNAVAILABLE" duration="03:06:20" cost="0" />
            <cdrRecord startDate="23/12/2004" startTime="11:12:00" cli="01612272811" destination="2361" sourceLocation="Manchester" duration="03:06:20" cost="0" />
          </incomingAnswered>
          <outgoingAnswered id="2">
            <cdrRecord startDate="23/12/2004" startTime="15:12:00" destination="O2" dialledNumber="07594702887" duration="00:06:20" cost="0.82" />
          </outgoingAnswered>
        </extension>
      </site>
   </region>
  </items>
</overviewData>

HERE IS XSL COUNT FUNCTION:

<xsl:value-of select="count(incomingAnswered/cdrRecord)"></xsl:value-of>

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