diff --git a/rangevote.js b/rangevote.js
index 43237cc..e5c8277 100644
--- a/rangevote.js
+++ b/rangevote.js
@@ -28,22 +28,61 @@ function CanId(c)
 
 
 // Set up data structures for Range Votes and Plur Votes
-var Experiment={}
-Experiment.RangeVotes=new Map();
-Experiment.RangePower=new Map();
-Experiment.RangeResult=new Map();
-Experiment.PlurVotes=new Map();
-Experiment.PlurResult=new Map();
-Experiment.PlurCount=0;
-for (let c of Candidates)
+var Experiment;
+
+fs.readFile('./rangevote.json', 'utf8', (err, data) => {
+    if (err) {
+        Experiment={};
+        Experiment.RangeVotes=new Map();
+        Experiment.RangePower=new Map();
+        Experiment.RangeResult=new Map();
+        Experiment.PlurVotes=new Map();
+        Experiment.PlurResult=new Map();
+        Experiment.PlurCount=0;
+    }
+    else Experiment=JSON.parse(data,MapReviver);
+    for (let c of Candidates)
+    {
+        let k=CanId(c);
+        let v=Experiment.RangePower.get(k);
+        if (typeof(v)!='number' || v==NaN || v==Infinity) Experiment.RangePower.set(k,0);
+        v=Experiment.RangeResult.get(k);
+        if (typeof(v)!='number' || v==NaN || v==Infinity) Experiment.RangeResult.set(k,0);
+        v=Experiment.PlurResult.get(k);
+        if (typeof(v)!='number' || v==NaN || v==Infinity) Experiment.PlurResult.set(k,0);
+    }
+})
+
+
+function LogErr(err)
 {
-    let k=CanId(c);
-    let v=Experiment.RangePower.get(k);
-    if (typeof(v)!='number' || v==NaN || v==Infinity) Experiment.RangePower.set(k,0);
-    v=Experiment.RangeResult.get(k);
-    if (typeof(v)!='number' || v==NaN || v==Infinity) Experiment.RangeResult.set(k,0);
-    v=Experiment.PlurResult.get(k);
-    if (typeof(v)!='number' || v==NaN || v==Infinity) Experiment.PlurResult.set(k,0);
+    if (err) console.log(err);
+}
+
+function MapReplacer(key, value) {
+  if(value instanceof Map) {
+    return {
+      dataType: 'Map',
+      value: Array.from(value.entries()), // or with spread: value: [...value]
+    };
+  } else {
+    return value;
+  }
+}
+
+function MapReviver(key, value) {
+  if(typeof value === 'object' && value !== null) {
+    if (value.dataType === 'Map') {
+      return new Map(value.value);
+    }
+  }
+  return value;
+}
+
+function Persist()
+{
+    var str=JSON.stringify(Experiment,MapReplacer);
+    fs.writeFile("./rangevote.json",str,LogErr);
 }
 
 
@@ -116,6 +155,8 @@ function AddToRangeResult(vote,mult=1)
 }
 
 
+
+
 function RangeVote(ip,entries)
 {
     console.log('IP: '+ip);
@@ -150,7 +191,7 @@ app.post('/range_vote', urlencodedParser, function (req, res) {
 	let key=CanId(c);
 	if (Experiment.RangePower.get(key)>0) str=str+c+': '+Math.round(Experiment.RangeResult.get(key)/Experiment.RangePower.get(key))+'% ('+Experiment.RangePower.get(key)+' Voters)<br>';
     }
-    console.log(JSON.stringify(Experiment));
+    Persist();
     res.send(str);
 })
 
@@ -162,6 +203,7 @@ app.post('/plur_vote', urlencodedParser, function (req, res) {
 	let key=CanId(c);
 	if (Experiment.PlurResult.get(key)>0) str=str+c+': '+Math.round(100.0*Experiment.PlurResult.get(key)/Experiment.PlurCount)+'%<br>';
     }
+    Persist();
     res.send(str);
 })