diff --git a/core/views/statistics.py b/core/views/statistics.py
index 30fc1b5f..7bf65206 100644
--- a/core/views/statistics.py
+++ b/core/views/statistics.py
@@ -32,7 +32,13 @@ def legs_by_expo(expos):
                 legsyear += int(sb.legsall)
         addupsurvexlength += survexleglength
         addupsurvexlegs += legsyear
-        legsbyexpo.append((expedition, {"nsurvexlegs": legsyear, "survexleglength": survexleglength}))
+        
+        expoers = PersonExpedition.objects.filter(expedition=expedition).count()
+        if expoers > 0:
+            success = survexleglength/expoers
+        else:
+            success = ""
+        legsbyexpo.append((expedition, {"success":success, "people": expoers, "nsurvexlegs": legsyear, "survexleglength": survexleglength}))
     legsbyexpo.reverse()
     return legsbyexpo, addupsurvexlegs, addupsurvexlength
     
diff --git a/templates/statistics.html b/templates/statistics.html
index 2daec6a8..44b6eec4 100644
--- a/templates/statistics.html
+++ b/templates/statistics.html
@@ -10,25 +10,28 @@
 <p>Number of survey legs: {{nsurvexlegs}} <br />
 Total length: {{addupsurvexlength|stringformat:".1f"}} km adding up the total for each year.</p>
 
-<p>These are uncorrected tape lengths which include pitches and duplicates but exclude splays or surface-surveys. 
+<p>These are uncorrected tape lengths which include pitches and duplicates but exclude splays or surface-surveys. They are also <em>before</em> any loop-closure corrections.
 <p>
 
-<p>This only includes lengths surveyed by Expo survey trips (though not all have valid Expo-attendees as some survex files are administrative collections of *include statements). This no longer (since 30 June 2025) includes ARGE and other non-expo surveys. 
+<p>This only includes lengths surveyed by Expo survey trips (though not all have valid Expo-attendees as some survex files are administrative collections of *include statements). This no longer (since 30 June 2025) includes non-expo surveys (ARGE and others). 
 
 <table>
-<tr><th>Year</th><th>Survex<br>Survey<br>Blocks</th><th>Survex<br>Survey Legs</th><th>Survex <br>length(m)</th></tr>
+<tr><th>Year</th><th>Survex<br>Survey<br>Blocks</th><th>Survex<br>Survey Legs</th><th>Survex <br>length(m)</th><th>Cavers</th><th>meters/caver</th></tr>
 {% for legs in legsbyexpo %}
 <tr>
   <td style="text-align:center"><a href="{{ legs.0.get_absolute_url }}">{{legs.0}}</a></td>
   <td style="text-align:center">{{legs.0.survexblock_set.all|length}}</td>
   <td style="text-align:center">{{legs.1.nsurvexlegs|rjust:"10"|floatformat:"0g"}} </td>
   <td style="text-align:right">{{legs.1.survexleglength|floatformat:"0g"}}</td>
+  <td style="text-align:right">{{legs.1.people|floatformat:"0g"}}</td>
+  <td style="text-align:right">{{legs.1.success|floatformat:"1g"}}</td>
 </tr>
 {% endfor %}
 </table>
 <p>One Survex Survey Block is one *begin/*end block of data in a survex file. 
 Some files from other caving clubs may have a convention of using many more blocks per file than we do, e.g. if the 
-file is exported from other software into survex format.
+file is exported from other software into survex format, but each block is recroded on a single day.
+<p>Currently the number of cavers includes non-caving attendees: that needs to be fixed.