none of Rhode Island's individual counties ranks among the 10 most Catholic in the United States, as Catholics are evenly spread throughout the state. According to the Public Religion Research Institute in 2020, 67% of the population were Christian, spread among evangelical and mainline Protestantism, and Roman Catholicism. Rhode Island's Jewish community, centered in the Providence area, emerged during a wave of Jewish immigration predominantly from Eastern Europeans shtetls between 1880 and 1920. The presence of the Touro Synagogue in Newport, the oldest existing synagogue in the United States, emphasizes that these second-wave immigrants did not create Rhode Island's first Jewish community; a comparatively smaller wave of Spanish and Portuguese Jews immigrated to Newport during the colonial era. The religiously unaffiliated since 2014 were 20% of the population, though the separate study by the Public Religion Research Institute determined the irreligious increased to 29% of the adult population. Economy The Rhode Island economy had a colonial base in fishing. The Blackstone River Valley was a major contributor to the American Industrial Revolution. It was in Pawtucket that Samuel Slater set up Slater Mill in 1793, using the waterpower of the Blackstone River to power his cotton mill. For a while, Rhode Island was one of the leaders in textiles. However, with the Great Depression, most textile factories relocated to southern U.S. states. The textile industry still constitutes a part of the Rhode Island economy but does not have the same power. Other important industries in Rhode Island's past included toolmaking, costume jewelry, and silverware. An interesting by-product of Rhode Island's industrial history is the number of abandoned factories, many of which are now condominiums, museums, offices, and low-income and elderly housing. Today, much of Rhode Island's economy is based on services, particularly healthcare and education, and still manufacturing to some extent. The state's nautical history continues in the 21st century in the form of nuclear submarine construction. Per the 2013 American Communities Survey, Rhode Island has the highest paid elementary school teachers in the country, with an average salary of $75,028 (adjusted to inflation). The headquarters of Citizens Financial Group, the 14th largest bank in the United States, is in Providence. The Fortune 500 companies CVS Caremark and Textron are based in Woonsocket and Providence, respectively. FM Global, GTECH Corporation, Hasbro, American Power Conversion, Nortek, and Amica Mutual Insurance are all Fortune 1000 companies based in Rhode Island. Rhode Island's