To the extent that there is more demand for rental properties than there is supply, it's contributing to the increase in prices.
I think that what you're describing there, though, with that significant increase.... Where there is rent control, the opportunity that the landlord has to increase rent comes when an apartment or a rental property turns over. Then you often see a bit of a catch-up or a big jump in the price. However, again, the solution to that is to increase supply.