Merge branch '1108-format-numbers-on-group-statistics-correctly' into 'master'

Resolve "Format numbers on group statistics correctly"

Closes #1108

See merge request !1603

aleksis/core/frontend/components/group/GroupStatisticsCard.vue

@@ -58,7 +58,11 @@ export default {
 
         <v-list-item-content>
           <v-list-item-title>
-            {{ $tc("time.years_n", group.statistics.ageAvg) }}
+            {{
+              $tc("time.years_n", group.statistics.ageAvg, {
+                n: $n(group.statistics.ageAvg),
+              })
+            }}
           </v-list-item-title>
           <v-list-item-subtitle>
             {{ $t("group.statistics.age_average") }}