diff --git a/src/Psc_Cpp_Core/Statistics/Statistics.h b/src/Psc_Cpp_Core/Statistics/Statistics.h
index 567f0a9..ca8556e 100644
--- a/src/Psc_Cpp_Core/Statistics/Statistics.h
+++ b/src/Psc_Cpp_Core/Statistics/Statistics.h
@@ -87,7 +87,9 @@ public:
     double smooth{};
     double variation{};
     double instant{};
+    double p50{};
     double p95{};
+    double p99{};
     size_t times{};
     size_t recent_count{};
     size_t recent_index{};
@@ -103,7 +105,9 @@ public:
         smooth = 0.0;
         variation = 0.0;
         instant = 0.0;
+        p50 = 0.0;
         p95 = 0.0;
+        p99 = 0.0;
         times = 0;
         recent_count = 0;
         recent_index = 0;
@@ -118,7 +122,9 @@ public:
         Ret_J(smooth)
         Ret_J(variation)
         Ret_J(instant)
+        Ret_J(p50)
         Ret_J(p95)
+        Ret_J(p99)
         Ret_J(times) return ret;
     }
     [[nodiscard]] std::string to_string() const {
@@ -160,6 +166,14 @@ private:
         if (index > 0)
             --index;
         p95 = sorted[index];
+        auto percentile_index = [this](double percentile) {
+            auto index = static_cast<std::size_t>(std::ceil(static_cast<double>(recent_count) * percentile));
+            if (index > 0)
+                --index;
+            return std::min(index, recent_count - 1);
+        };
+        p50 = sorted[percentile_index(0.50)];
+        p99 = sorted[percentile_index(0.99)];
     }
 };
 class Probability_Statistics : public Base_Statistics {