of independence. A Congress of Micronesia first levied an income tax in 1971. It affected mainly foreigners working at military bases in the region. On October 21, 1986, the U.S. ended its administration of the Marshall Islands District. The termination of U.S. administration of the Chuuk, Yap, Kosrae, Pohnpei, and the Mariana Islands districts of the TTPI soon followed on November 3, 1986. The Security Council formally ended the trusteeship for the Chuuk, Yap, Kosrae, Pohnpei, Mariana Islands, and Marshall Islands districts on December 22, 1990, pursuant to Security Council Resolution 683. On May 25, 1994, the Council ended the trusteeship for the Palau District pursuant to Security Council Resolution 956, after which the U.S. and Palau agreed to establish the latter's independence on October 1. Geography In 1969, the 100 occupied islands comprised over an area of of sea. The latter area was comparable in size to the continental United States. The water area is about 5% of the Pacific Ocean. Demographics The population of the islands was 200,000 in the latter part of the 19th century. The population decreased to 100,000 by 1969 due to emigration, war, and disease. At that time, the population inhabited less than 100 out of 2,141 of the Marshall, Mariana, and Caroline Islands. Education In 1947 the Mariana Islands' Teacher Training School (MITTS), a normal school serving all areas of the Trust Territory, opened in Guam. It moved to Chuuk in 1948, to be more central in the Trust Territory, and was renamed Pacific Islands' Teacher Training School (PITTS). It transitioned from being a normal school to a comprehensive secondary school, so it was renamed the Pacific Islands Central School (PICS). The school moved to Pohnpei in 1959. At the time it was a three-year institution housing students who graduated from intermediate schools. The school, later known as Pohnpei Island Central School (PICS), is now Bailey Olter High School. Palau Intermediate School, established in 1946, became Palau High School in 1962 as it added senior high grades. From the late 1960s to the middle of the 1970s, several public high schools were built or received additions in the Trust Territory. They included Jaluit High School, Kosrae High School, Marshall Islands High School in Majuro, Palau High, PICS, and Truk High School (now Chuuk High School). The Micronesian Occupational College in Koror, Palau was also built. It later merged with the Kolonia-based Community College