You are lucky :) Some math - 1 hour a day less sleep than "normal" people give you:

1 hr * 365 days / 24 hours in day ~ 15 days.

And these are 24hours day. What it really should be:

1 hr * 365 days / (24 hours in day - 6 hours you sleep on average) ~ 21 days.

Which is, well, in office terms, work month :) congrats, you got 1/12 life for free :)