This is what I did a few mins ago for inserting a row after every 8th, not 10th row, should work if you modify the code.
Dim insert_loop As Integer
For insert_loop = 0 To 100
Rows(9 + insert_loop * 9).EntireRow.Insert
Cells(9 + insert_loop * 9, 1).Value = "SecRev"
Cells(9 + insert_loop * 9, 2).Value = Cells(6 + insert_loop * 9, 2)
Cells(9 + insert_loop * 9, 3).Value = Cells(6 + insert_loop * 9, 3)
Basically you have to create a 9th row, and then it gets shifted down, so instead of 17th row you need to insert 18th row, then instead of 25th row you need to insert 17th row, so on. So instead of * 8 you * 9.
This code seems to be working for me. I've never worked with VBA, so I'm excited to learn. However, I need to exclude title row, and start from row 2. I dont know how to modify the code to do it. Can you please help?