Need help with Sinumerik subprogram

Hi,
I am trying to program a loop for broaching a keyway. I am making subprogram for that, but dont know how to program it correctly so I need some help.
I am trying to program this:
G0 Y-5 (comming to starting position)
G1 Z-72 F3000 (broaching down with a feedrate)
G0 Y0 (rapid to safe y position)
G0 Z1 (rapid out to safe z)
G0 Y-5.05 (rapid to next y position)
G1 Z-72 F3000
G0 Y0
G0 Z1
G0 Y-5.1

So the question is how to write a cycle that goes to to the next y by he same amount (y-5.05 ; y-5.1 ; y-5.15; y-5.2 etc) for lets say 60 times. Of course I can write that manually, but maybe it is possible to write a cycle for that?
Hope you understand the question.

... use an Incremental move with Y say .1mm looped 10 times would be 1.0mm or what ever you like

Can you write an example how the code with incremental move should look like?

,,,here's one way might work for ya....format might not be correct...change as needed

in the Main program Position your start point

N100 G0 G90 X0 Y-5 Z1 (starting position) or what ever
N101 BROACH Pxxxx (the P is how many times to repeat the sub program)
N102 G0 G90
N103 G28 Z0
N104M30

BROACH
G91 Y-.05
G1 Z-73 F3000 (broaching down with a feedrate)
G0 Y.05(rapid to safe y position)
G0 Z73 (rapid out to safe z)
G0 Y-.05 (rapid return from safe y move)
M17 or M99 (not sure for your machine)