diff --git a/documentation/NDPluginStats.html b/documentation/NDPluginStats.html
index 29441d9..ba70e65 100755
--- a/documentation/NDPluginStats.html
+++ b/documentation/NDPluginStats.html
@@ -351,6 +351,26 @@
         <td>
           ai</td>
       </tr>
+      <tr>
+        <td>
+          NDPluginStats<br />
+          SigmaXY</td>
+        <td>
+          asynFloat64</td>
+        <td>
+          r/o</td>
+        <td>
+          This is the normalized value of sigmaXY, i.e. sigmaXY/(sigmaX * sigmaY). This is
+          often called the correlation coefficient, r. It is zero if the X and Y profiles
+          are not correlated, meaning that the distribution is not tilted with respect to
+          the X and Y axes.</td>
+        <td>
+          SIGMAXY_VALUE</td>
+        <td>
+          $(P)$(R)SigmaXY_RBV</td>
+        <td>
+          ai</td>
+      </tr>
       <tr>
         <td align="center" colspan="7,">
           <b>X and Y Profiles</b></td>