Question: How much in ticket revenue in 2013 did the busiest Amtrak route that uses the Wallingford station earn?

Context paragraphs:
Lancaster station (Pennsylvania): Lancaster is an Amtrak railroad station and a former Pennsylvania Railroad station in Lancaster, Lancaster County in the U.S. state of Pennsylvania.  Located on the Keystone Corridor, the station is served by the "Keystone Service" between New York City and Harrisburg, and by the "Pennsylvanian" between New York and Pittsburgh.  Lancaster is the second busiest Amtrak station in Pennsylvania, and the twenty-first busiest in the United States.

Freeport station (Illinois): Freeport is a proposed Amtrak station in Freeport, Illinois.  The station will serve a new Chicago-Rockford-Dubuque Amtrak route that was expected to begin operation in late 2014 or early 2015, but has since been put under review by the state of Illinois.  The station's construction largely involves the renovation of the Rawleigh building - part of an abandoned factory complex in downtown Freeport, as well as a concourse and train platform addition onto the complex.  However, with the new proposal for Amtrak service to terminate in Rockford following the inability of the state of Illinois to reach a deal with the Canadian National Railway (CN) for use of their tracks, the Freeport station project is on hold until a deal can be reached with CN.

Wallingford station (SEPTA): Wallingford station is a SEPTA Regional Rail station in Wallingford, Pennsylvania.  Located at Kershaw Road and Possum Hollow Road, it serves the Media/Elwyn Line.  In 2013, this station saw 284 boardings and 420 alightings on an average weekday.

Galena station: The Galena Amtrak station is a proposed train station located in Galena, Illinois, and will serve a new Chicago-Rockford-Dubuque Amtrak route that was expected to begin operation in late 2014 or early 2015, but has since been put under review by the state of Illinois.  However, with the new proposal for Amtrak service to terminate in Rockford following the inability of the state of Illinois to reach a deal with the Canadian National Railway for use of their tracks, the Galena station project is on hold until a deal can be reached with the CN.

Wallingford station (Connecticut): Wallingford station is an Amtrak train station in Wallingford, Connecticut.  It serves the "Northeast Regional" , "New Haven – Springfield Shuttle" , and the "Vermonter" lines.  The station is located adjacent to the town green, between Hall Avenue and Quinnipiac Avenue, near where both intersect with Colony Street (U.S. Route 5).

Providence station: Providence is a railroad station in Providence, Rhode Island, served by Amtrak and MBTA Commuter Rail.  The station has four tracks and two island platforms for passenger service, with a fifth track passing through for Providence and Worcester Railroad freight trains.  It is now the 11th busiest Amtrak station in the country, and the busiest on the MBTA Commuter Rail system outside of the downtown Boston terminals.

Northeast Regional: The Northeast Regional is a higher-speed rail service operated by Amtrak in the Northeastern and Mid-Atlantic United States.  In the past it has been known as the "NortheastDirect", "Acela Regional", or "Regional".  It is the busiest Amtrak route, carrying 8.04 million passengers in fiscal year (FY) 2013, a 0.4% increase over the 8.01 million passengers in FY2012.  The "Northeast Regional" service earned over $568.7 million in gross ticket revenue in FY2013, a 6.2% increase over the $536 million earned during FY2012.

Orlando Health/Amtrak station: Orlando Health/Amtrak station, also known as Orlando station, is a train station in Orlando, Florida.  It is served by Amtrak, the national railroad passenger system of the United States, and SunRail, the commuter rail service of Greater Orlando, as well as local and intercity buses.  It serves Amtrak's "Silver Meteor" and "Silver Star" lines.  Built in 1926, the historic station is located approximately one mile south of Downtown Orlando near the campus of Orlando Health.  Serving 160,442 passengers at last measure in 2013, The station is Amtrak's fifth busiest in the Southeastern United States; it is the second busiest Amtrak station in Florida, behind the Sanford station of the Auto Train.

Sacramento Valley Station: Sacramento Valley Station (SAC) is an Amtrak railway station in the city of Sacramento, California, at 401 I Street on the corner of Fifth Street.  It is the 2nd busiest station in California, and 7th busiest Amtrak Station in America, with thousands of riders a day and over a million passengers per year.  Today it is served by 38 daily Amtrak and Amtrak California trains, many Amtrak Thruway Motorcoaches, plus the western terminus of the Sacramento RT light rail Gold Line and the Route 30 bus serving Sacramento State University.  It is a planned station of the Sacramento Streetcar.

Lena station: The Lena Amtrak station is a proposed train station located in Lena, Illinois, and will serve a new Chicago-Rockford-Dubuque Amtrak route that was expected to begin operation in late 2014 or early 2015, but has since been put under review by the state of Illinois.  Lena would be a flag stop; the only one on the route.  However, with the new proposal for Amtrak service to terminate in Rockford following the inability of the state of Illinois to reach a deal with the Canadian National Railway for use of their tracks, the Lena station project is on hold until a deal can be reached with the CN.

Supporting paragraphs: Wallingford station (Connecticut) Northeast Regional
Answer: $568.7 million