{% load variables filtertags %}
{% ifnotequal confidence None %}
  {% assign "high" to confidence_level %}
  {% if confidence|is_lt:95 %}
    {% assign "medium" to confidence_level %}
  {% endif %}
  {% if confidence|is_lt:90 %}
    {% assign "low" to confidence_level %}
  {% endif %}
  <span class="{{confidence_level}}_confidence">
    {{ confidence|stringformat:"d" }} %
  </span>
{% else %}
  N/A
{% endifnotequal %}