diff --git a/internal/exporter/metrics.go b/internal/exporter/metrics.go
index ba593f8..f672de9 100644
--- a/internal/exporter/metrics.go
+++ b/internal/exporter/metrics.go
@@ -193,19 +193,15 @@ func (m *Metrics) collectReqeustDataMetrics(ch chan<- prometheus.Metric, queue *
 		sum += latency
 		count++
 
+		var cumulativeCount uint64
 		for _, bound := range bucketBounds {
 			if latency <= bound {
-				buckets[bound]++
+				cumulativeCount++
 			}
+			buckets[bound] += cumulativeCount
 		}
 	}
 
-	var cumulativeCount uint64
-	for _, bound := range bucketBounds {
-		cumulativeCount += buckets[bound]
-		buckets[bound] = cumulativeCount
-	}
-
 	m.counter += uint(len(data))
 	ch <- prometheus.MustNewConstMetric(
 		m.metricRequestsTotal,