Question: What was the population in July 2018 of the city that is home to the USLC soccer-specific stadium opened the earliest ?

text: Soccer-specific stadium
USL Championship ( USLC ) -- Current USLC soccer-specific stadiums
All USL Championship teams will be required to play in self-owned , soccer-specific stadiums by the 2020 season . The following is a list of current USL stadiums that are soccer-specific stadiums :
Soccer-specific stadium is a term used mainly in the United States and Canada to refer to a sports stadium either purpose-built or fundamentally redesigned for soccer and whose primary function is to host soccer matches, as opposed to a multi-purpose stadium which is for a variety of sports. A soccer-specific stadium may host other sporting events (such as lacrosse, American football and rugby) and concerts, but the design and purpose of a soccer-specific stadium is primarily for soccer. Some facilities (for example Toyota Park, Toyota Stadium and Mapfre Stadium) have a permanent stage at one end of the stadium used for staging concerts. A soccer-specific stadium typically has amenities, dimensions and scale suitable for soccer in North America, including a scoreboard, video screen, luxury suites and possibly a roof. The field dimensions are within the range found optimal by FIFA: 110-120 yards (100-110 m) long by 70-80 yards (64-73 m) wide. These soccer field dimensions are wider than the regulation American football field width of 53 1⁄3 yards (48.8 m), or the 65-yard (59 m) width of a Canadian football field. The playing surface typically consists of grass as opposed to artificial turf, as the latter is generally disfavored for soccer matches since players are more susceptible to injuries. However, some soccer specific stadiums, such as Portland's Providence Park and Creighton University's Morrison Stadium, do have artificial turf. The seating capacity is generally between 18,000 and 30,000 for a Major League Soccer franchise, or smaller for college or minor league soccer teams. This is in comparison to the much larger American football stadiums that mostly range between 60,000 and 80,000 in which the original North American Soccer League teams played and most MLS teams occupied during the league's inception. As opposed to gridiron-style football stadiums, where the front row of seats is elevated several feet above the field of play to allow spectators to see over the heads of substitute players and coaches on the sidelines, soccer-specific venues typically have the front row closer to the level of the pitch.
Stadium Club ( s ) City Capacity Opened
Al Lang Stadium Tampa Bay Rowdies St. Petersburg , Florida 7,227 1947 ( 2015 renovation )
BBVA Field Birmingham Legion FC Birmingham , Alabama 5,000 2019
Bold Stadium Austin Bold FC Austin , Texas 5,000 2019
Cashman Field Las Vegas Lights FC Las Vegas , Nevada 9,334 1983 ( 2019-2020 renovation )
Casino Arizona Field Phoenix Rising FC Tempe , Arizona 6,200 2017
Champion Stadium Orange County SC Irvine , California 5,000 2017
Children 's Mercy Park Sporting Kansas City II Kansas City , Kansas 18,467 2011
Dillon Stadium Hartford Athletic Hartford , Connecticut 5,500 1960 ( 2019 renovation )
Fifth Third Bank Stadium Atlanta United 2 Kennesaw , Georgia 8,318 2010
H-E-B Park Rio Grande Valley FC Toros Edinburg , Texas 9,400 2017
Highmark Stadium Pittsburgh Riverhounds SC Pittsburgh , Pennsylvania 5,000 2013
Lynn Family Stadium Louisville City FC Louisville , Kentucky 11,700 2020
MSU Soccer Park at Pittser Field New York Red Bulls II Montclair , New Jersey 5,000 1998 ( Renovated 2016 , 2018 )
Mecklenburg County Sportsplex Charlotte Independence Matthews , North Carolina 5,000 2017
Papa Murphy 's Park Sacramento Republic FC Sacramento , California 11,242 2014
Patriots Point Soccer Complex Charleston Battery Mount Pleasant , South Carolina 5,000 2000
Segra Field Loudoun United FC Leesburg , Virginia 5,000 2019
Taft Stadium Oklahoma City Energy FC Oklahoma City , Oklahoma 5,000 1934
Talen Energy Stadium Philadelphia Union II Chester , Pennsylvania 18,500 2011
Toyota Field San Antonio FC San Antonio , Texas 8,296 2013