between 18 and 24; 30.8% from 25 to 44; 23.1% from 45 to 64; and 8.9% at 65 or older. The gender makeup of the city was 48.8% male and 51.2% female. Economy Mastercard has a major presence in O'Fallon. Venture Stores was headquartered and maintained a distribution center in O'Fallon, until its dissolution. The buildings are now occupied by True Manufacturing. Air Evac Lifeteam, a medical helicopter service for the rural areas of the Ozarks, moved its headquarters to O'Fallon in 2015. Sports O'Fallon was the home of the River City Rascals independent Frontier League baseball team. The Rascals played at CarShield Field in O'Fallon, which was built in 1999. It is located on Tom Ginnever Boulevard and T.R. Hughes Boulevard near downtown. The organization ceased operations after the 2019 season. The O'Fallon Hoots and the CarShield Collegiate League now play at the stadium. Parks and recreation Civic Park, a park, it features Alligator's Creek Aquatic Center, a bandstand and amphitheater. Dames Park is a sports park with three football fields and a fitness course. Fort Zumwalt Park is a park featuring a fishing lake, a disc golf course, playgrounds, and historic Fort Zumwalt. Knaust Park is a park with a playground and walking path. O'Fallon Sports Park is a soccer complex with 12 fields, playgrounds, and concessions. It is also home to the Renaud Spirit Center. Ozzie Smith Sports Complex is a baseball/softball complex with seven diamonds, adjacent to CarShield Field. Westhoff Park is a park featuring baseball diamonds, sand volleyball courts, horseshoe pits, basketball courts, tennis and handball courts, and a skate park. Climate O'Fallon has a humid subtropical climate (Köppen Cfa). Summers are hot and humid, while winters are moderately cold. Government O'Fallon operates under a charter form of government. The mayor serves four-year terms without term limits and is also the President of the City Council. The 10-member council consists of two members from each of the five wards; the council had 8 members until the fifth ward was created in 2010. City council members served two-year terms until 2010, when they switched to three-year terms. The council elects a President Pro Tempore from among its members, who presides over the council in the mayor's absence. Bill Hennessy has served as mayor since 2009. The most senior member of the council is Debbie Cook, who was elected to a Ward 5 seat in a 2014