One for the Reg Standards Bureau
Well, well, well. Something else that grows on the order of 30mm/year. Others are the moon's orbit and the width of the Atlantic. And fingernails. So may I propose a new Reg Standard for low velocity, namely fingernails per annum?
Incidentally, this concurrence of orbital growth means that the Moon's closest approach to the Sun remains unchanged, even as the Earth drifts away.