sponsored by Governor Bruce Babbitt, raised the price of water to farmers, while cities had to reach a "safe yield" so that the groundwater usage did not exceed natural replenishment. New housing developments had to prove they had enough water for the next hundred years. Desert foliage suitable for a dry region soon replaced grass. Cotton acreage declined dramatically, freeing up land for suburban sprawl as well as releasing large amounts of water and ending the need for expensive specialized machinery. Cotton acreage plunged from 120,000 acres in 1997 to only 40,000 acres in 2005, even as the federal treasury gave the state's farmers over $678 million in cotton subsidies. Many farmers collect the subsidies but no longer grow cotton. About 80% of the state's cotton is exported to textile factories in China and (since the passage of NAFTA) to Mexico. Recent events Super Bowl XXX was played in Tempe in 1996 and Super Bowl XLII was held in Glendale in 2008. Super Bowl XLIX was also held in Glendale in 2015. Illegal immigration continued to be a prime concern within the state, and in April 2010, Arizona SB1070 was passed and signed into law by Governor Jan Brewer. The measure attracted national attention as the most thorough anti-illegal immigration measure in decades within the United States. On June 30, 2013, nineteen members of the Prescott Fire Department were killed fighting the Yarnell Hill Fire. The fatalities were members of the Granite Mountain Hotshots, a hotshot crew, of whom only one survived as he was working in another location. In June 2017, a heat wave grounded more than 40 airline flights of small aircraft, with American Airlines reducing sales on certain flights to prevent the vehicles from being over the maximum weight permitted for safe takeoff. See also History of Arizona Arizona v. United States Government of Arizona History of Flagstaff, Arizona History of the Colorado Plateau Index of Arizona-related articles Indigenous peoples of the North American Southwest Women's suffrage in Arizona List of cities and towns in Arizona List of counties in Arizona List of ghost towns in Arizona List of governors of Arizona Outline of Arizona Southwestern archaeology Territorial evolution of Arizona Territory of Arizona State of Arizona Timeline of Arizona Timeline of Arizona history Timeline of Mesa, Arizona Timeline of Phoenix, Arizona Timeline of Tucson, Arizona John S. Goff, Arizona researcher References Bibliography Surveys Cheek, Lawrence W.