According to the Rent Guidelines Board in New York City, as of 2020, approximately 44.6% of apartments in NYC are rent stabilized or rent controlled. However, it's important to note that within this percentage, there is a distinction between rent stabilized and rent controlled units. Rent stabilization accounts for the majority of this percentage, while rent-controlled units represent a smaller portion. The exact breakdown between these two categories may vary over time due to changes in regulations and market conditions.