count and write number of nodes

Hello i have this:
<?xml version="1.0" encoding="UTF-8"?>
<registros>
<registro>
<pagina>the page a</pagina>
</registro>
<registro>
<pagina>the page b</pagina>
</registro>
<registro>
<pagina>the page c</pagina>
</registro>
<registro>
<pagina>the page d</pagina>
</registro>
<registro>
<pagina>the page e</pagina>
</registro>
</registros>

using xsl how can count the number of pagina nodes (5 in this example) and
how can i put:
1.- the page node value (<xsl:value-of  select="pagina"/>
2.- the next page
......

how can i count the nuber of pages and show in order 1, 2 , 3, 4, .....n
pages


Thanks

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