Sub InsertRow_At_Change()
Dim i As Long
With Application
.Calculation = xlManual
.ScreenUpdating = False
End With
For i = Cells(Rows.Count, 1).End(xlUp).Row To 2 Step -1
If Cells(i - 1, 1) < Cells(i, 1) Then _
Cells(i, 1).Resize(1, 1).EntireRow.Insert
Next i
With Application
.Calculation = xlAutomatic
.ScreenUpdating = True
End With
End Sub

Maybe this would help...