for a county attorney, to be hired by the county administrator with the advice and consent of the county commissioners. The charter contains a provision for a charter review board appointed by County Commissioners every five years to conduct a study of county government and propose amendments to the charter. These amendments must be presented to voters for approval. One amendment was approved in November 2002, adding the position of County Internal Performance Auditor to the government structure. This position reports directly to the County Commission. The current administrator is Bonnie M. Wise, who took office on July 1, 2020, replacing Mike Merrill, who had served as administrator since 2010. Wise previously served as the county's deputy administrator and Tampa's chief financial officer. Of the seven members of the Board of County Commissioners for Hillsborough County, four are elected from single-member districts, and three are elected county-wide. The board approves the county's operating and capital budgets and the county's capital-improvement program. It may take action on any programs for the improvement of the county and the welfare of its residents. Government officials These five countywide elected positions have specific responsibilities under the county charter: Clerk of the Circuit Court: Cindy Stuart (D) Sheriff: Chad Chronister (R) Property Appraiser: Bob Henriquez (D) Tax Collector: Nancy Millan (D) Supervisor of Elections: Craig Latimer (D) Under a charter ordinance that went into effect May 1985, county commissioners are directed to perform legislative functions of government by developing policy for the management of Hillsborough County. The county administrator, a professional appointed by the board, and the administrative staff are responsible for the implementation of these policies. The board also serves as the Environmental Protection Commission. Individual board members serve on various other boards, authorities, and commissions such as the Hillsborough Area Regional Transit Authority, Tampa Bay Regional Planning Council, Tampa Bay Water, Aviation Authority, Expressway Authority, Sports Authority, Port Authority, Arts Council of Hillsborough County, Children's Board, Metropolitan Planning Organization, and Council of Governments. Taxes Hillsborough County's discretionary sales tax rate increased from 1% to 2.5% in January 2019. When combined with the state of Florida's 6%, the rate is 8.5%, the highest in Florida. The rate includes two surcharges approved by voter referendum in November 2018, 1% for transportation and 1/2% for schools. It is only collected on the first $5000 of any large purchase. Economy In the early 20th century, Hillsborough's economy