stone, bromine, and vanadium. According to CNBC, Arkansas is the 20th-best state for business, with the 2nd-lowest cost of doing business, 5th-lowest cost of living, 11th-best workforce, 20th-best economic climate, 28th-best-educated workforce, 31st-best infrastructure and the 32nd-friendliest regulatory environment. Arkansas gained 12 spots in the best state for business rankings since 2011. As of 2014, it was the most affordable state to live in. As of June 2021, the state's unemployment rate was 4.4%; the preliminary rate for November 2021 is 3.4%. Industry and commerce Arkansas's earliest industries were fur trading and agriculture, with development of cotton plantations in the areas near the Mississippi River. They were dependent on slave labor through the American Civil War. Today only about three percent of the population are employed in the agricultural sector, it remains a major part of the state's economy, ranking 13th in the nation in the value of products sold. Arkansas is the nation's largest producer of rice, broilers, and turkeys, and ranks in the top three for cotton, pullets, and aquaculture (catfish). Forestry remains strong in the Arkansas Timberlands, and the state ranks fourth nationally and first in the South in softwood lumber production. Automobile parts manufacturers have opened factories in eastern Arkansas to support auto plants in other states. Bauxite was formerly a large part of the state's economy, mined mostly around Saline County. Tourism is also very important to the Arkansas economy; the official state nickname "The Natural State" was created for state tourism advertising in the 1970s, and is still used to this day. The state maintains 52 state parks and the National Park Service maintains seven properties in Arkansas. The completion of the William Jefferson Clinton Presidential Library in Little Rock has drawn many visitors to the city and revitalized the nearby River Market District. Many cities also hold festivals, which draw tourists to Arkansas culture, such as The Bradley County Pink Tomato Festival in Warren, King Biscuit Blues Festival, Ozark Folk Festival, Toad Suck Daze, and Tontitown Grape Festival. Transportation Transportation in Arkansas is overseen by the Arkansas Department of Transportation (ArDOT), headquartered in Little Rock. Several main corridors pass through Little Rock, including Interstate30 (I-30) and I-40 (the nation's 3rd-busiest trucking corridor). Arkansas first designated a state highway system in 1924, and first numbered its roads in 1926. Arkansas had one of the first paved roads, the Dollarway Road, and one of the