Problem with node-occurence statistics

Hi,
I have an xml document that is similar to this:

<?xml version="1.0" encoding="utf-8"?>
<report>

<group>
<groupid>group1</groupid>
<goalcount>2</goalcount>
<details>
<team>
<teamleader>P.P.</teamleader>
<goal>[2]</goal>
</team>
<team>
<teamleader>T.T.</teamleader>
<goal>[2]</goal>
</team>
</details>
</group>

<group>
<groupid>group2</groupid>
<goalcount>3</goalcount>
<details>
<team>
<teamleader>N.N.</teamleader>
<goal>[3]</goal>
</team>
<team>
<teamleader>P.P.</teamleader>
<goal>[2]</goal>
</team>
<team>
<teamleader>T.T.</teamleader>
<goal>[3]</goal>
</team>
</details>
</group>



<group>
<groupid>group3</groupid>
<goalcount>1</goalcount>
<details>
<team>
<teamleader>T.T.</teamleader>
<goal>[1]</goal>
</team>
<team>
<teamleader>P.P.</teamleader>
<goal>[3]</goal>
</team>
</details>
</group>

</report>

I want to produce a report that will show how many times the same number of goals have been acheived under the same teamleader.
So the result should look something like this:

teamleader goal number of occurences
P.P. 2 2
P.P. 3 1
T.T. 2 1
T.T. 3 1
T.T. 1 1
N.N. 3 1

Please can someone tell me how to do this?

I have got this but it doesn't work:
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xslutput
method="html"/>
<xsl:key name="IDs" match="teamleader" use="../goal" />
<xsl:key name="IDs2" match="attribvalue" use="../../teamleader" />
<xsl:template match="/">
<div><table cellpadding="5">


<tr><th>teamleader</th><th>goal</th><th>Number of occurences</th></tr>
<xsl:for-each select="//teamleader">
<xsl:variable name="tmp">
<xsl:value-of select="../goal" />
</xsl:variable>

<xsl:variable name="tmp2">
<xsl:value-of select="." />
</xsl:variable>
<xsl:if test="generate-id(.) = generate-id(key('IDs',$tmp)[1])">
<tr><td><xsl:value-of select="."/></td>
<td><xsl:value-of select="$tmp" /></td>
<td><xsl:value-of select="count(key('IDs',$tmp))"/></td></tr>
</xsl:if>

</xsl:for-each>


</table>
</div>
</xsl:template>


</xsl:stylesheet>