diff --git a/src/pregmod/basenationalitiesControls.tw b/src/pregmod/basenationalitiesControls.tw
index bedd7043f450f738b3758ece6dfbada72f046fb6..a8ad1c58c9240cd9becc595b2bfbd5cdda7f05fa 100644
--- a/src/pregmod/basenationalitiesControls.tw
+++ b/src/pregmod/basenationalitiesControls.tw
@@ -14,22 +14,17 @@
 <</if>>
 <br>
 
-/* Generates cloned array of $nationalities, removing duplicates */
-<<set $nationalitiescheck = clone($nationalities)>>
-<<for _i = 0; _i < $nationalitiescheck.length; _i++>>
-	<<set _nation = $nationalitiescheck[_i]>>
-	<<if $nationalitiescheck.count(_nation) > 1>>
-		<<set $nationalitiescheck.deleteAt(_i), _i-->>
-	<</if>>
-<</for>>
-<<set $nationalitiescheck.sort()>>
+/* Generates cloned array of $nationalities, removing duplicates and then sorting */
+<<set $nationalitiescheck = _.uniq($nationalities, false).sort()>>
 
 /* Prints distribution of $nationalities, using $nationalitiescheck to render array */
+<<set _totalPercentage = 0>>
 <<for _i = 0; _i < $nationalitiescheck.length; _i++>>
-	<<set _nation = $nationalitiescheck[_i]>>
-	<<print _nation>> @@.orange;<<print (($nationalities.count(_nation)/$nationalities.length)*100).toFixed(2)>>%@@
-<<if _i < $nationalitiescheck.length-1>> | <</if>>
+	<<set _nation = $nationalitiescheck[_i], _percentage = (($nationalities.count(_nation)/$nationalities.length)*100), _totalPercentage += _percentage>>
+	<<print _nation>> @@.orange;<<print _percentage.toFixed(2)>>%@@
+	<<if _i < $nationalitiescheck.length-1>> | <</if>>
 <</for>>
+<<if _totalPercentage != 100>><br>//Percentages add up to _totalPercentage//<</if>>
 <br><br>
 
 /* Fine control tweaking of populations */