the larger metropolitan area. Downtown Detroit has seen a resurgence in the 21st century as a business center and entertainment hub with the opening of three casino resort hotels. In 1940, the city of Detroit held about one-third of the state's population, while the metropolitan region currently holds roughly one-half of the state's population. For the 2010 census, the city of Detroit's population was 713,777, while metropolitan Detroit's combined statistical area had a population of 5,218,852. Through much of the 1990s and first decade of the 21st century, the city completed significant revitalizations. Immigration continues to play a role in the region's projected growth with the population of Detroit-Ann Arbor-Flint (CMSA) estimated to be 6,191,000 by 2025. 21st century In the late 1980s and early 1990s, the city began to experience a revival, much of it centered in Downtown, Midtown, and New Center. After purchasing and renovating the historic Fox Theatre and Fox Office Centre in 1987, Mike Ilitch and Marian Ilitch moved Little Caesars Pizza's headquarters to Downtown Detroit. One Detroit Center (1993) arose on the city skyline. Newer downtown residents are predominantly young professionals. The city has three casino resort hotels - MGM Grand Detroit, MotorCity Casino, and Hollywood Casino - with one of the larger gaming industry markets in the U.S. New downtown stadiums Comerica Park and Ford Field were constructed for the Detroit Tigers and Detroit Lions in 2000 and 2002, respectively; this placed the Lions' stadium in the city proper for the first time since 1974. Opened in 2017 Little Caesars Arena allows the Detroit Red Wings and Detroit Pistons to have a shared home, and thus locating the Pistons' in the city proper for the first time since 1978, also making Detroit the only North American city to have all major professional sports based in its downtown. In 2008, the city witnessed grand restorations of the historic Book Cadillac Hotel and the Fort Shelby Hotel. The city has hosted major sporting events - the 2005 MLB All-Star Game, 2006 Super Bowl XL, 2006 World Series, WrestleMania 23 in 2007 and the NCAA Final Four in April 2009 - all of which prompted many improvements to the area. The city's International Riverfront is a focus of much development which has complemented similar developments in Windsor, Ontario. In 2007, Detroit completed the first major portions of the River Walk, including miles of parks and fountains. The