Hello. See the link provided. It is compiled by the foremost appraiser in Manhattan, Miller Samuel Inc. and is compiled for Prudential Douglas Elliman Real Estate. There are breakdowns and aggregate numbers. Download the PDF file.
Something to keep in mind would be the supply and demand aspect of real estate rentals in Manhattan. Vacancy rates are low and demand is extremely high. Prices do fluctuate and this report should be considered a guide as opposed to something set in stone, since we can only look at the immediate past. Good luck.
** All information contained herein does not constitute any warranties, offer or commitment or obligation of any sort and/or kind whatsoever and is subject to change, error, omission and/or withdrawal without prior notice. **