xslt help -count the number of max values in a thread

[Maya Hague]

Hi,
Can someone help me count the number of maximum values for a thread in xslt. I 
would like to do something like 
 
<xsl:param name ="count"/>
<xsl:for-each select="$nodes">
    <xsl:sort data-type="number" order="descending" />
    <xsl:if test="position() = 1">
     <xsl:value-of select="$count+1" />
    </xsl:if>
   </xsl:for-each>

Thanks in advance
Maya