don't show boats which are still on the water

src/model/stat.rs

@@ -52,6 +52,10 @@ impl BoatStat {
             let name: String = row.get("name");
             let location: String = row.get("location");
             let year: i32 = row.get("year");
+            if year == 0 {
+                continue; // Boat still on water
+            }
+
             if !years.contains(&year) {
                 years.push(year);
             }