&gt;   Survey_1 Survey_2      Type Subpopulation Indicator     Category  DiffEst.P</span></span>
<span><span class="co">#&gt; 1  2008-09  2013-14 All_Sites     All Sites NITR_COND         Fair -1.8867976</span></span>
<span><span class="co">#&gt; 2  2008-09  2013-14 All_Sites     All Sites NITR_COND         Good -2.9648182</span></span>
<span><span class="co">#&gt; 3  2008-09  2013-14 All_Sites     All Sites NITR_COND Not Assessed -0.2447633</span></span>
<span><span class="co">#&gt; 4  2008-09  2013-14 All