Question: What is the estimated population of this city in 2018 where the nation 's 11th-busiest SEPTA train station is located ?

text: List of SEPTA Regional Rail stations
Stations

SEPTA Regional Rail is the commuter rail system serving Philadelphia, Pennsylvania, United States and its metropolitan region, known as the Delaware Valley. The system is operated by the Southeastern Pennsylvania Transportation Authority (SEPTA) and serves five counties in Pennsylvania - Bucks, Delaware, Montgomery, Chester, and Philadelphia - as well as Mercer County in New Jersey and New Castle County in Delaware. The system covers a total route length of 223 miles (359 km), 98 miles (158 km) of which are owned by SEPTA, with the remainder owned by Amtrak, CSX Transportation, and the City of Philadelphia. In the 2019 fiscal year, SEPTA Regional Rail had an annual ridership of 34.2 million, with an average weekday ridership of 118,800. There are 13 lines within the Regional Rail system, with 155 active stations. Six fare zones in the system determine the ticket price, based on the distance traveled. Fare zones are designated as Zones 1 through 4, based on the station's distance from Center City Philadelphia, with additional zones for stations in the Center City area (CCP zone) and stations in New Jersey (NJ zone). Despite its close proximity to Center City, the four Airport Terminal stations are located within Zone 4. The Regional Rail system was built in the early 20th century and originally consisted of two separate systems, operated by the Pennsylvania Railroad and the Reading Company, respectively. SEPTA was formed in 1963, and the Pennsylvania Railroad merged into the Penn Central Transportation Company in 1968. Penn Central and the Reading Company operated the railroads until they were taken over by Conrail in 1976, which operated the system through 1982. SEPTA commenced operation of the Regional Rail Division on January 1, 1983, which gave SEPTA complete operational control of its railroads.
Station Line Rail connections Zone Location
30th Street Station Airport Line Chestnut Hill East Line Chestnut Hill West Line Cynwyd Line Fox Chase Line Lansdale/​Doylestown Line Manayunk/​Norristown Line Media/Elwyn Line Paoli/​Thorndale Line Trenton Line Warminster Line West Trenton Line Wilmington/​Newark Line Market-Frankford Line Route 10 Trolley Route 11 Trolley Route 13 Trolley Route 34 Trolley Route 36 Trolley Amtrak : Keystone Corridor Northeast Corridor New Jersey Transit : Atlantic City Line CCP Philadelphia ( University City )
49th Street Media/Elwyn Line Route 13 Trolley 1 Philadelphia ( Kingessing )
9th Street Lansdale/​Doylestown Line N/A 4 Lansdale
Airport Terminal A Airport Line N/A 4 Philadelphia ( Airport )
Airport Terminal B Airport Line N/A 4 Philadelphia ( Airport )
Airport Terminals C & D Airport Line N/A 4 Philadelphia ( Airport )
Airport Terminals E & F Airport Line N/A 4 Philadelphia ( Airport )
Allegheny Manayunk/​Norristown Line N/A 1 Philadelphia ( Swampoodle )
Allen Lane Chestnut Hill West Line N/A 2 Philadelphia ( West Mount Airy )
Ambler Lansdale/​Doylestown Line N/A 3 Ambler
Angora Media/Elwyn Line Route 34 Trolley 1 Philadelphia ( Angora )
Ardmore Paoli/​Thorndale Line Amtrak : Keystone Corridor 2 Ardmore
Ardsley Warminster Line N/A 3 Ardsley
Bala Cynwyd Line N/A 2 Bala Cynwyd
Berwyn Paoli/​Thorndale Line N/A 3 Berwyn
Bethayres West Trenton Line N/A 3 Bethayres
Bridesburg Trenton Line N/A 2 Philadelphia ( Bridesburg )
Bristol Trenton Line N/A 4 Bristol
Bryn Mawr Paoli/​Thorndale Line N/A 3 Bryn Mawr
Carpenter Chestnut Hill West Line N/A 2 Philadelphia ( West Mount Airy )