diff --git a/Back/skydiveLogs-api.Domain/Statistic.cs b/Back/skydiveLogs-api.Domain/Statistic.cs
index 4360bd4..6c46376 100644
--- a/Back/skydiveLogs-api.Domain/Statistic.cs
+++ b/Back/skydiveLogs-api.Domain/Statistic.cs
@@ -6,6 +6,8 @@
 
         public string Label { get; set; }
 
+        public string Label2 { get; set; }
+
         public int Nb { get; set; }
 
         #endregion Public Properties
diff --git a/Back/skydiveLogs-api.Domain/TunnelFlight.cs b/Back/skydiveLogs-api.Domain/TunnelFlight.cs
index 6036326..bdb537d 100644
--- a/Back/skydiveLogs-api.Domain/TunnelFlight.cs
+++ b/Back/skydiveLogs-api.Domain/TunnelFlight.cs
@@ -1,5 +1,4 @@
 using System;
-using System.Collections.Generic;
 
 namespace skydiveLogs_api.Domain
 {
diff --git a/Back/skydiveLogs-api.DomainBusiness/TunnelFlightService.cs b/Back/skydiveLogs-api.DomainBusiness/TunnelFlightService.cs
index 7ae5e4d..ff769da 100644
--- a/Back/skydiveLogs-api.DomainBusiness/TunnelFlightService.cs
+++ b/Back/skydiveLogs-api.DomainBusiness/TunnelFlightService.cs
@@ -56,11 +56,12 @@ namespace skydiveLogs_api.DomainBusiness
 
             if (allTunnelFlights.Any())
             {
-                results = allTunnelFlights.GroupBy(j => j.FlightDate.ToString("yy-MM"),
+                results = allTunnelFlights.GroupBy(j => new { FlightDate = j.FlightDate.ToString("yy-MM"), j.JumpType },
                                                    j => j,
                                                    (groupby, tunnelFlights) => new Statistic
                                                    {
-                                                       Label = groupby.ToString(),
+                                                       Label = groupby.FlightDate,
+                                                       Label2 = groupby.JumpType.Name,
                                                        Nb = tunnelFlights.Sum(t => t.NbMinutes)
                                                    })
                                            .ToList();
diff --git a/Back/skydiveLogs-api/Controllers/TunnelFlightController.cs b/Back/skydiveLogs-api/Controllers/TunnelFlightController.cs
index 49fda1a..c04a37b 100644
--- a/Back/skydiveLogs-api/Controllers/TunnelFlightController.cs
+++ b/Back/skydiveLogs-api/Controllers/TunnelFlightController.cs
@@ -53,10 +53,10 @@ namespace skydiveLogs_api.Controllers
         // GET: api/TunnelFlight/month/20230101/20230701
         [HttpGet("month/{beginDate}/{endDate}")]
         [EnableCors]
-        public IEnumerable<StatisticResp> GetGroupByMonth(string beginDate, string endDate)
+        public IEnumerable<StatisticForChartResp> GetGroupByMonth(string beginDate, string endDate)
         {
             var result = _tunnelFlightService.GetTunnelFlightGroupByMonth(beginDate, endDate);
-            return _mapper.Map<IEnumerable<StatisticResp>>(result);
+            return _mapper.Map<IEnumerable<StatisticForChartResp>>(result);
         }
 
         // POST: api/Tunnel
diff --git a/Back/skydiveLogs-api/DataContract/StatisticForChartResp.cs b/Back/skydiveLogs-api/DataContract/StatisticForChartResp.cs
new file mode 100644
index 0000000..d674fa1
--- /dev/null
+++ b/Back/skydiveLogs-api/DataContract/StatisticForChartResp.cs
@@ -0,0 +1,11 @@
+namespace skydiveLogs_api.DataContract
+{
+    public class StatisticForChartResp
+    {
+        public string Label { get; set; }
+
+        public string Label2 { get; set; }
+
+        public int Nb { get; set; }
+    }
+}
diff --git a/Back/skydiveLogs-api/Mapper/ModelProfile.cs b/Back/skydiveLogs-api/Mapper/ModelProfile.cs
index fdfb83c..8cea0f3 100644
--- a/Back/skydiveLogs-api/Mapper/ModelProfile.cs
+++ b/Back/skydiveLogs-api/Mapper/ModelProfile.cs
@@ -19,23 +19,26 @@ namespace skydiveLogs_api.Mapper
             CreateMap<DataContract.ImageReq, UserImage>();
             CreateMap<DataContract.TunnelFlightReq, TunnelFlight>();
 
-            CreateMap<Gear, DataContract.GearResp>();
             CreateMap<Jump, DataContract.JumpResp>().ForMember(dest => dest.AircraftId, opt => opt.MapFrom(s => s.Aircraft.Id))
                                                     .ForMember(dest => dest.DropZoneId, opt => opt.MapFrom(s => s.DropZone.Id))
                                                     .ForMember(dest => dest.GearId, opt => opt.MapFrom(s => s.Gear.Id))
                                                     .ForMember(dest => dest.JumpTypeId, opt => opt.MapFrom(s => s.JumpType.Id));
+            CreateMap<TunnelFlight, DataContract.TunnelFlightResp>();
+
+            CreateMap<Gear, DataContract.GearResp>();
             CreateMap<JumpType, DataContract.JumpTypeResp>();
             CreateMap<Aircraft, DataContract.AircraftResp>();
             CreateMap<Aircraft, DataContract.AircraftSimpleResp>();
             CreateMap<DropZone, DataContract.DropZoneResp>();
             CreateMap<DropZone, DataContract.DropZoneSimpleResp>();
+            CreateMap<Tunnel, DataContract.TunnelResp>();
+            
             CreateMap<Statistic, DataContract.StatisticResp>();
+            CreateMap<Statistic, DataContract.StatisticForChartResp>();
+            CreateMap<SimpleSummary, DataContract.SimpleSummaryResp>();
+
             CreateMap<User, DataContract.UserResp>();
             CreateMap<UserImage, DataContract.ImageResp>();
-            CreateMap<Tunnel, DataContract.TunnelResp>();
-            CreateMap<TunnelFlight, DataContract.TunnelFlightResp>();
-
-            CreateMap<SimpleSummary, DataContract.SimpleSummaryResp>();
         }
 
         #endregion Public Constructors