The small Silicon Valley city of Menlo Park saw a large increase in population last year. The leading factor, according The Mercury News, is a rise in new housing developments across 2016.

Data recently released by the State of California Department of Finance states that Menlo Park has welcomed close to 2,000 new residents from the start of 2016 to the start of 2017. The 5.51 percent population growth is the most of any Bay Area city in that timeframe.

In 2012 Menlo Park’s housing plan was not providing enough homes based on demand, so the city updated zoning regulations. This update allowed for new construction of about 4,500 homes, 1,000 of which are either completed or currently underway. It also hasn’t hurt that Facebook employs 6,000 people here, many of whom were looking for housing closer to work.

According to the data, Menlo Park’s population boom was also the second-highest increase in the state, following Ione, a town in Amador County.