>, </span>"2001"<span style="color: #949494;">, </span>"2000"<span style="color: #949494;">, </span>"2001"</span></span>
<span><span class="co">#&gt; $ U       <span style="color: #949494; font-style: italic;">&lt;list&gt;</span> &lt;&lt;matrix[11 x 9]&gt;&gt;<span style="color: #949494;">, </span>&lt;&lt;matrix[11 x 9]&gt;&gt;<span style="color: #949494;">, </span>&lt;&lt;matrix[11 x 9]&gt;&gt;<span style="color: #949494;">, </span>&lt;&lt;‚Ä¶</span></span>
<span><span class="co">#&gt; $ V       <span 