{% assign taxonomies = site.posts | group_by_exp: "post", "post.date | date: '%Y'" %}

<ul class="taxonomies">
  {%- for taxonomy in taxonomies -%}
    <li>
      {%- capture link -%}{{ page.permalink }}#{{ taxonomy.name }}{%- endcapture -%}
      <a class="taxonomy" href="{{ link | relative_url }}">
        <span>{{ taxonomy.name }}</span>
        <span>{{ taxonomy.size }}</span>
      </a> 
    </li>
  {%- endfor -%}
</ul>

{%- for taxonomy in taxonomies -%}
  <h2 id="{{ taxonomy.name }}">{{ taxonomy.name }}</h2>
  <ul>
    {%- assign posts = taxonomy.items -%}
    {%- for post in posts -%}
      <li>
        <time class="archive-date" datetime="{{ page.date | date_to_xmlschema }}">{{ post.date | date: "%Y-%m-%d" }}</time> 
        &raquo;
        <a href="{{ post.url | relative_url }}">{{ post.title | escape }}</a>
      </li>
    {%- endfor -%}
  </ul>
{%- endfor -%}