{% comment %}
Year-on-year delta badge. `delta.kind == 'base'` marks the first year (no prior to
compare), `'none'` a gap after an empty year; otherwise `delta.dir` is up/down.
{% endcomment %}{% if delta.kind == 'base' %}
baseline
{% elif delta.kind == 'none' %}
—
{% else %}
{% if delta.dir == 'up' %}{% else %}{% endif %}{{ delta.text }}
{% endif %}