diff --git a/project.clj b/project.clj
index ae13963..c781149 100644
--- a/project.clj
+++ b/project.clj
@@ -5,7 +5,7 @@
                  [com.widdindustries/cljc.java-time "0.1.22"]
                  [org.xerial/sqlite-jdbc "3.7.15-M1"]]
   :description "FIXME: write description"
-  :jvm-opts ["-Xmx4g"]
+  ;; :jvm-opts ["-Xmx4g"]
   :license {:name "GNU General Public License,version 2.0 or (at your option) an
 y later version"
             :url "https://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html"}
diff --git a/src/gaza_stats/core.clj b/src/gaza_stats/core.clj
index 2415f8e..44f8bd4 100644
--- a/src/gaza_stats/core.clj
+++ b/src/gaza_stats/core.clj
@@ -122,6 +122,36 @@
     (xy-chart {(format "Donations between\n%s and\n%s" start-date end-date)
                [(range (count data)) (sort (map :donations data))]})))
 
+(defn chart-donations-as-percentage-in-date-range
+  "Return a chart of donations received by individual accounts between
+  `start-date` (exclusive) and `end-date` (inclusive). Arguments should be
+  supplied as `java.time.LocalDate` objects, or as strings in the format
+  `yyyy-mm-dd`. Accounts are identified in the chart only by rank order."
+  [start-date end-date]
+  (let [data (accounts-with-donations-by-date-range start-date end-date)
+        donations (sort (map :donations data))
+        total (reduce + donations)
+        percentages (map #(* 100.0 (/ % total)) donations)]
+    (xy-chart {(format "Donations as percent\nof total donations\nbetween %s and\n%s" start-date end-date)
+               [(range (count data)) percentages]})))
+
+(defn chart-accounts-with-donations-by-months-in-range
+  [start-date end-date]
+  (let [sd (cond (date? start-date) start-date
+                 (string? start-date) (ld/parse start-date)
+                 :else (ld/now))
+        ed (cond (date? end-date) end-date
+                 (string? end-date) (ld/parse end-date)
+                 :else (ld/now))]
+    (loop [s (.withDayOfMonth sd 1)
+           i (.withDayOfMonth (.plusMonths sd 1) 1)
+           m {}]
+      (let [data (accounts-with-donations-by-date-range s i)
+            m' (assoc m (format "Donations between\n%s and\n%s" s i)
+                      [(range (count data)) (sort (map :donations data))])]
+      (if (ld/is-before ed i) (xy-chart m')
+        (recur i (.withDayOfMonth (.plusMonths i 1) 1) m'))))))
+
 ;; this does not work and I don't know why
 ;; (as-sql '(select 'campaign_donations
 ;;                  (fields :amount :campaign_url :created_at)