Variant stock level

Hello,

How do I print variant stock level in template? I'm listing the variables with the snippet below. I've searched docs, forum, google and found nothing. Perch is great, but the documentation not so much :(

<perch:form id="add_to_cart" app="perch_shop" action="/cart">
      <perch:if exists="has_variants">
        <perch:productopts>
        <fieldset>
          <legend><perch:productopt id="title" /></legend>
          <perch:productvalues>
            <perch:before><ul></perch:before>
              <li>
                <label>
                  <perch:input id="options" name="opt-<perch:productvalue id="optionID" />[]" 
                    value="<perch:productvalue id="valueID" />" type="radio" required="required" />
                  <perch:productvalue id="valueTitle" />
                </label>
              </li>
            <perch:after></ul></perch:after>
          </perch:productvalues>
          </fieldset>
        </perch:productopts>
      </perch:if>
      <perch:input id="product" type="hidden" value="<perch:shop id="productID" type="hidden" env-autofill="false" />" />
      <perch:input type="submit" class="cart-submit" value="Add to Shopping Bag" />
    </perch:form>