diff --git a/api.ts b/api.ts
index cfd6652..deb8900 100644
--- a/api.ts
+++ b/api.ts
@@ -48,7 +48,7 @@ function apply_guidance(doc: any) {
   function setAnchors(items, channelFirstChar, v1ds, v0ds, histKey) {
     for (let item of items) {
       // Update the last_price with the most recent price
-      const years = Object.keys(item.season);
+      const years = Object.keys(item.season).map(Number).filter(year => year >= 2020);
       if (years.length > 0) {
         const recentYear = Math.max(...years.map(Number));
         const earlyYear = Math.min(...years.map(Number));